Search NASA⌕ Search

SEARCH · Search NASA

Results for “N square clusters”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 37 records · Page 2
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Br3N(O2F5)2 by Materials Project

NO2(OBrF3)2BrF4 is beta Plutonium-derived structured and crystallizes in the orthorhombic P2_12_12 space group. The structure is zero-dimensional and consists of four hydroxylamine, n-hydroxy- molecules; four BrF4 clusters; and eight OBrF3 clusters. In two of the BrF4 clusters, Br5+ is bonded in a square co-planar geometry to four F1- atoms. There are a spread of Br–F bond distances ranging from 1.83–2.13 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Br5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Br5+ atom. In the third F1- site, F1- is bonded in a distorted single-bond geometry to one Br5+ atom. In two of the BrF4 clusters, Br5+ is bonded in a square co-planar geometry to four F1- atoms. There is two shorter (1.87 Å) and two longer (2.02 Å) Br–F bond length. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Br5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Br5+ atom. In each OBrF3 cluster, O2- is bonded in a single-bond geometry to one Br5+ atom. The O–Br bond length is 1.60 Å. Br5+ is bonded in a see-saw-like geometry to one O2- and three F1- atoms. There are a spread of Br–F bond distances ranging from 1.82–1.90 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted single-bond geometry to one Br5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Br5+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Br5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CoH20PtC4(NO3)4 by Materials Project

Pt(NH3)4CoH4(C2O5)2(H2O)2 crystallizes in the orthorhombic I222 space group. The structure is zero-dimensional and consists of four water molecules, two CoH4(C2O5)2 clusters, and two Pt(NH3)4 clusters. In each CoH4(C2O5)2 cluster, Co2+ is bonded in an octahedral geometry to six O2- atoms. There are two shorter (2.06 Å) and four longer (2.12 Å) Co–O bond lengths. C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.28 Å) C–O bond length. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one C4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Co2+ and two equivalent H1+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co2+ and one C4+ atom. In each Pt(NH3)4 cluster, Pt2- is bonded in a square co-planar geometry to four equivalent N3- atoms. All Pt–N bond lengths are 2.07 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Pt2- and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiH20PtC4(NO3)4 by Materials Project

Pt(NH3)4NiH4(C2O5)2(H2O)2 crystallizes in the orthorhombic I222 space group. The structure is zero-dimensional and consists of four water molecules, two NiH4(C2O5)2 clusters, and two Pt(NH3)4 clusters. In each NiH4(C2O5)2 cluster, Ni2+ is bonded in an octahedral geometry to six O2- atoms. There are four shorter (2.07 Å) and two longer (2.08 Å) Ni–O bond lengths. C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.28 Å) C–O bond length. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one C4+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Ni2+ and two equivalent H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Ni2+ and one C4+ atom. In each Pt(NH3)4 cluster, Pt2- is bonded in a square co-planar geometry to four equivalent N3- atoms. All Pt–N bond lengths are 2.06 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Pt2- and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CoH12PdC4(NO3)4 by Materials Project

Co(CO3)4PdN4H12 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional and consists of two PdN4H12 clusters and one Co(CO3)4 framework. In each PdN4H12 cluster, Pd4+ is bonded in a square co-planar geometry to four equivalent N3- atoms. All Pd–N bond lengths are 2.06 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Pd4+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the Co(CO3)4 framework, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four equivalent OO4 tetrahedra. There is two shorter (1.75 Å) and four longer (1.95 Å) Co–O bond length. C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.24 Å) and one longer (1.31 Å) C–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to one Co4+ and one C4+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C4+ and one O2- atom. The O–O bond length is 2.78 Å. In the third O2- site, O2- is bonded in a single-bond geometry to one Co4+ and two equivalent O2- atoms. Both O–O bond lengths are 2.85 Å. In the fourth O2- site, O2- is bonded to four O2- atoms to form OO4 tetrahedra that share corners with two equivalent CoO6 octahedra and an edgeedge with one OO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cu(N3O2)2 by Materials Project

CuN4(NO2)2 crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of four nitrous acid molecules and two CuN4 clusters. In each CuN4 cluster, Cu2+ is bonded in a square co-planar geometry to four equivalent N1+ atoms. All Cu–N bond lengths are 1.83 Å. N1+ is bonded in a single-bond geometry to one Cu2+ atom.

36 MATERIALS SCIENCE↗
NASA NTRS1971

A search for N-type galaxies

A large number of distant clusters of galaxies was examined for the presence of a bright compact galaxy or blue stellar object. Nearly 600 square degrees of sky were searched using glass copies of the National Geographic Society-Palomar Observatory Sky Survey plates, and over 20 fields were selected for observation. The objects were examined for infrared and ultraviolet excesses, using wideband filter photography and spectroscopy. Initial findings include a faint, distant cluster of galaxies near the quasi-stellar radio source 4C 37.43 with a red shift of 0.370. One of these galaxies has an emission line at 6895 A, indicating a possible red shift of 0.377 of the 5007 A line of (0 III).

Jefferies, J. T.↗
NASA NTRS1984

Multi-grid technique for the solution of incompressible Navier-Stokes equations

A computationally efficient method is proposed for obtaining fine-mesh solutions of the Navier-Stokes equations for high-Re flow, including separation. The method involves implementing a multi-grid solution procedure with suitably chosen elements, such that the resulting overall solution technique is efficient as well as robust. The robustness and efficiency of the solution technique are demonstrated by applying it to three model problems: flow in a driven cavity, downstream asymptotic flow in curved ducts of square and polar sections, and Newmann boundary-value problem in clustered curvilinear orthogonal coordinates.

Ghia, K. N.↗
DOE OSTI2024

Robust Tensor Hypercontraction of the Particle–Particle Ladder Term in Equation-of-Motion Coupled Cluster Theory

One method of representing a high-rank tensor as a (hyper-)product of lower-rank tensors is the tensor hypercontraction (THC) method of Hohenstein et al. This strategy has been found to be useful for reducing the polynomial scaling of coupled-cluster methods by representation of a four-dimensional tensor of electron-repulsion integrals in terms of five two-dimensional matrices. Pierce et al. have already shown that the application of a robust form of THC to the particle–particle ladder (PPL) term reduces the cost of this term in couple-cluster singles and doubles (CCSD) from O(N 6 ) to O(N 5 ) with negligible errors in energy with respect to the density-fitted variant. In this work, we have implemented the least-squares variant of THC (LS-THC) which does not require a nonlinear tensor factorization, including the robust form (R-LS-THC), for the calculation of the excitation and electron attachment energies using equation-of-motion coupled cluster methods EOMEE-CCSD and EOMEA-CCSD, respectively. We have benchmarked the effect of the R-LS-THC-PPL approximation on excitation energies using the comprehensive QUEST database and the accuracy of electron attachment energies using the NAB22 database. Here, we find that errors on the order of 1 meV are achievable with a reduction in total calculation time of approximately 5x.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
NASA NTRS1992

A balanced submatrix merging algorithm for multiprocessor architectures

In this article, a parallel algorithm which applies Givens rotations to selectively annihilate k(k + 1)/2 nonzero elements from two k x n(k not more than n) upper trapezoidal submatrices is described. The new algorithm is suitable for implementation on either a pair of directly connected local-memory processors or two clusters of multiple tightly-coupled processors. Analyses show that in both cases the proposed algorithms achieve optimal speed-up by balancing the work load distribution and masking interprocessor or intercluster communication by computation if k is much small than n. In the context of solving large scale least squares problems, this submatrix merging step is repetitively needed during the entire computation and, furthermore, there are usually many pairs of such submatrices to be merged with each submatrix stored in the memory of a processor or a cluster of processors. The proposed algorithm can be applied to each pair of submatrices concurrently, and thus parallelizes an important step in solving the least squares problems.

Chu, Eleanor↗
DOE OSTI2020

Materials Data on CuH36C8(N5O4)2 by Materials Project

CuH20(C4N5)2(H2O)8 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of thirty-two water molecules and four CuH20(C4N5)2 clusters. In each CuH20(C4N5)2 cluster, Cu2+ is bonded in a square co-planar geometry to four N3- atoms. There is two shorter (1.94 Å) and two longer (1.96 Å) Cu–N bond length. There are four inequivalent C1+ sites. In the first C1+ site, C1+ is bonded to one N3- and three H1+ atoms to form corner-sharing CH3N tetrahedra. The C–N bond length is 1.45 Å. There is one shorter (1.09 Å) and two longer (1.10 Å) C–H bond length. In the second C1+ site, C1+ is bonded to one N3- and three H1+ atoms to form corner-sharing CH3N tetrahedra. The C–N bond length is 1.45 Å. There is one shorter (1.09 Å) and two longer (1.10 Å) C–H bond length. In the third C1+ site, C1+ is bonded in a trigonal planar geometry to three N3- atoms. There is one shorter (1.33 Å) and two longer (1.37 Å) C–N bond length. In the fourth C1+ site, C1+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.32–1.40 Å. There are five inequivalent N3- sites. In the first N3- site, N3- is bonded in a bent 120 degrees geometry to two C1+ atoms. In the second N3- site, N3- is bonded in a trigonal planar geometry to three C1+ atoms. In the third N3- site, N3- is bonded in a trigonal non-coplanar geometry to one C1+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the fourth N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C1+, and one H1+ atom. The N–H bond length is 1.02 Å. In the fifth N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C1+, and one H1+ atom. The N–H bond length is 1.02 Å. There are ten inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C1+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C1+ atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one C1+ atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one C1+ atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one C1+ atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C1+ atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CuH18C4N10(ClO)2 by Materials Project

(CuH14(C2N5)2)2(H2O)2(H2OCl)2Cl2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two hydrochloric acid molecules; two hydrochloric acid, monohydrate molecules; two water molecules; and two CuH14(C2N5)2 clusters. In each CuH14(C2N5)2 cluster, Cu2+ is bonded in a square co-planar geometry to four N3- atoms. There is one shorter (1.95 Å) and three longer (1.96 Å) Cu–N bond length. There are four inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.31–1.38 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.31–1.37 Å. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.31–1.38 Å. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.31–1.37 Å. There are ten inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C4+, and one H1+ atom. The N–H bond length is 1.02 Å. In the second N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.01 Å) and one longer (1.02 Å) N–H bond length. In the third N3- site, N3- is bonded in a trigonal planar geometry to two C4+ and one H1+ atom. The N–H bond length is 1.05 Å. In the fourth N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. There is one shorter (1.01 Å) and one longer (1.02 Å) N–H bond length. In the fifth N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C4+, and one H1+ atom. The N–H bond length is 1.02 Å. In the sixth N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C4+, and one H1+ atom. The N–H bond length is 1.03 Å. In the seventh N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the eighth N3- site, N3- is bonded in a trigonal planar geometry to two C4+ and one H1+ atom. The N–H bond length is 1.04 Å. In the ninth N3- site, N3- is bonded in a distorted trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the tenth N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C4+, and one H1+ atom. The N–H bond length is 1.03 Å. There are fourteen inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the thirteenth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourteenth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CuH16C4(N5O)2 by Materials Project

CuH12(C2N5)2(H2O)2 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of eight water molecules and four CuH12(C2N5)2 clusters. In each CuH12(C2N5)2 cluster, Cu2+ is bonded in a square co-planar geometry to four N3- atoms. There is two shorter (1.93 Å) and two longer (1.96 Å) Cu–N bond length. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.33–1.39 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There is one shorter (1.33 Å) and two longer (1.36 Å) C–N bond length. There are five inequivalent N3- sites. In the first N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the second N3- site, N3- is bonded in a distorted trigonal non-coplanar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.03 Å. In the third N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C4+, and one H1+ atom. The N–H bond length is 1.02 Å. In the fourth N3- site, N3- is bonded in a bent 120 degrees geometry to two C4+ atoms. In the fifth N3- site, N3- is bonded in a distorted trigonal planar geometry to one Cu2+, one C4+, and one H1+ atom. The N–H bond length is 1.03 Å. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C3N by Materials Project

C3N is Potassium Silver Cyanide-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional and consists of one ammonia molecule, eight methane molecules, one C4N cluster, and one C2N framework. In the C4N cluster, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.39 Å. N3- is bonded in a square co-planar geometry to four equivalent C1+ atoms. In the C2N framework, there are nine inequivalent C1+ sites. In the first C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.24 Å) and one longer (1.81 Å) C–N bond length. In the second C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.24 Å) and one longer (1.81 Å) C–N bond length. In the third C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.56 Å) and one longer (2.15 Å) C–N bond length. In the fourth C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.56 Å) and one longer (2.15 Å) C–N bond length. In the fifth C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.56 Å) and one longer (2.15 Å) C–N bond length. In the sixth C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.69 Å) and one longer (2.02 Å) C–N bond length. In the seventh C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.69 Å) and one longer (2.02 Å) C–N bond length. In the eighth C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.69 Å) and one longer (2.02 Å) C–N bond length. In the ninth C1+ site, C1+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.69 Å) and one longer (2.02 Å) C–N bond length. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded in a square co-planar geometry to four C1+ atoms. In the second N3- site, N3- is bonded in a square co-planar geometry to four C1+ atoms. In the third N3- site, N3- is bonded in a linear geometry to two C1+ atoms. In the fourth N3- site, N3- is bonded in an octahedral geometry to six C1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on IN5 by Materials Project

IN5 is lead oxide-like structured and crystallizes in the tetragonal P4/n space group. The structure is zero-dimensional and consists of two ammonia molecules and two IN4 clusters. In each IN4 cluster, N+0.20+ is bonded in a single-bond geometry to one I1- atom. The N–I bond length is 2.13 Å. I1- is bonded in a distorted square co-planar geometry to four equivalent N+0.20+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pd(NO4)2 by Materials Project

Pd(NO4)2 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of four Pd(NO4)2 clusters. Pd is bonded in a square co-planar geometry to four O atoms. There is two shorter (1.76 Å) and two longer (2.13 Å) Pd–O bond length. N is bonded in a trigonal planar geometry to three O atoms. There is two shorter (1.24 Å) and one longer (1.33 Å) N–O bond length. There are four inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one N atom. In the second O site, O is bonded in a single-bond geometry to one Pd atom. In the third O site, O is bonded in a bent 120 degrees geometry to one Pd and one N atom. In the fourth O site, O is bonded in a single-bond geometry to one N atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CuS2(NO7)2 by Materials Project

Cu(NO4)2(SO3)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four sulfur trioxide molecules and two Cu(NO4)2 clusters. In each Cu(NO4)2 cluster, Cu is bonded in a square co-planar geometry to four O atoms. There are two shorter (1.86 Å) and two longer (2.28 Å) Cu–O bond lengths. N is bonded in a bent 120 degrees geometry to two O atoms. There is one shorter (1.21 Å) and one longer (1.32 Å) N–O bond length. There are four inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to one Cu and one O atom. The O–O bond length is 1.24 Å. In the second O site, O is bonded in a single-bond geometry to one O atom. In the third O site, O is bonded in a single-bond geometry to one N atom. In the fourth O site, O is bonded in a bent 120 degrees geometry to one Cu and one N atom.

36 MATERIALS SCIENCE↗
NASA NTRS2011

Power-Law Template for IR Point Source Clustering

We perform a combined fit to angular power spectra of unresolved infrared (IR) point sources from the Planck satellite (at 217,353,545 and 857 GHz, over angular scales 100 < I < 2200), the Balloonborne Large-Aperture Submillimeter Telescope (BLAST; 250, 350 and 500 microns; 1000 < I < 9000), and from correlating BLAST and Atacama Cosmology Telescope (ACT; 148 and 218 GHz) maps. We find that the clustered power over the range of angular scales and frequencies considered is well fit by a simple power law of the form C_l\propto I(sup -n) with n = 1.25 +/- 0.06. While the IR sources are understood to lie at a range of redshifts, with a variety of dust properties, we find that the frequency dependence of the clustering power can be described by the square of a modified blackbody, nu(sup beta) B(nu,T_eff), with a single emissivity index beta = 2.20 +/- 0.07 and effective temperature T_eff= 9.7 K. Our predictions for the clustering amplitude are consistent with existing ACT and South Pole Telescope results at around 150 and 220 GHz, as is our prediction for the effective dust spectral index, which we find to be alpha_150-220 = 3.68 +/- 0.07 between 150 and 220 GHz. Our constraints on the clustering shape and frequency dependence can be used to model the IR clustering as a contaminant in Cosmic Microwave Background anisotropy measurements. The combined Planck and BLAST data also rule out a linear bias clustering model.

Addison, Graeme E.↗
NASA NTRS2012

Power-Law Template for Infrared Point-Source Clustering

We perform a combined fit to angular power spectra of unresolved infrared (IR) point sources from the Planck satellite (at 217, 353, 545, and 857 GHz, over angular scales 100 approx < l approx < 2200), the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST; 250, 350, and 500 micron; 1000 approx < l approx < 9000), and from correlating BLAST and Atacama Cosmology Telescope (ACT; 148 and 218 GHz) maps. We find that the clustered power over the range of angular scales and frequencies considered is well fitted by a simple power law of the form C(sup clust)(sub l) varies as l (sub −n) with n = 1.25 +/- 0.06. While the IR sources are understood to lie at a range of redshifts, with a variety of dust properties, we find that the frequency dependence of the clustering power can be described by the square of a modified blackbody, ν(sup Beta)B(ν, T(sub eff) ), with a single emissivity index Beta = 2.20 +/- 0.07 and effective temperature T(sub eff) = 9.7 K. Our predictions for the clustering amplitude are consistent with existing ACT and South Pole Telescope results at around 150 and 220 GHz, as is our prediction for the effective dust spectral index, which we find to be alpha(sub 150-220) = 3.68 +/- 0.07 between 150 and 220 GHz. Our constraints on the clustering shape and frequency dependence can be used to model the IR clustering as a contaminant in cosmic microwave background anisotropy measurements. The combined Planck and BLAST data also rule out a linear bias clustering model.

cosmic background radiation↗