Search NASA⌕ Search

SEARCH · Search NASA

Results for “SnCl4”

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.

10 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on SnCl4 by Materials Project

SnCl4 is Silicon tetrafluoride-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four tin tetrachloride molecules. Sn4+ is bonded in a tetrahedral geometry to four Cl1- atoms. All Sn–Cl bond lengths are 2.32 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom.

36 MATERIALS SCIENCE↗
NASA NTRS1973

Radiolytic preparation of anhydrous tin (2) chloride

Anhydrous tin (2) chloride (SnCl2) is prepared by radiolysis with high energy electrons of a tin (4) chloride (SnCl4) solution in heptane. The SnCl4 is reduced to insoluble SNCl2. The energy yield, G(SnCl2), molecules of SnCl2, produced per 100 eV, increases with SnCl4 concentration from 1.6 at 0.15 M SnCl4 to 3.1 at 3.0 M SnCl4. Other parameters such as temperature total dose and beam current have little influence on G(SnCl2). The method may be used to prepare other metal halides if the higher valence, more covalent metal halide is soluble in aliphatic hydrocarbons and the lower more ionic metal halide is insoluble. The reaction mechanism is discussed; the radiolysis of both heptane and SnCl4 is involved. At high SnCl4 concentration G(SnCl2) appears to be limited by the yield of SnC13 radicals.

Philipp, W. H.↗
DOE OSTI2020

Materials Data on SnH10Cl4O5 by Materials Project

SnCl4(H2O)2(H2O)3 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of twelve water molecules and four SnCl4(H2O)2 clusters. In each SnCl4(H2O)2 cluster, Sn4+ is bonded in an octahedral geometry to two equivalent O2- and four Cl1- atoms. Both Sn–O bond lengths are 2.16 Å. All Sn–Cl bond lengths are 2.43 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. O2- is bonded in a distorted bent 120 degrees geometry to one Sn4+ and two H1+ atoms. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnN2Cl4O by Materials Project

N2(SnCl4)2(NO)2 crystallizes in the orthorhombic Pna2_1 space group. The structure is one-dimensional and consists of four ammonia molecules; four nitroxyl molecules; and two SnCl4 ribbons oriented in the (1, 0, 0) direction. In each SnCl4 ribbon, Sn4+ is bonded to six Cl1- atoms to form edge-sharing SnCl6 octahedra. There are a spread of Sn–Cl bond distances ranging from 2.38–2.63 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom. In the second Cl1- site, Cl1- is bonded in a distorted L-shaped geometry to two equivalent Sn4+ atoms. In the third Cl1- site, Cl1- is bonded in an L-shaped geometry to two equivalent Sn4+ atoms. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sn2W3Cl14 by Materials Project

W3Sn2Cl14 crystallizes in the hexagonal P6_3 space group. The structure is two-dimensional and consists of two W3Sn2Cl14 sheets oriented in the (0, 0, 1) direction. W+3.33+ is bonded to six Cl1- atoms to form WCl6 octahedra that share a cornercorner with one SnCl4 trigonal pyramid and edges with two equivalent WCl6 octahedra. There are a spread of W–Cl bond distances ranging from 2.41–2.50 Å. There are two inequivalent Sn2+ sites. In the first Sn2+ site, Sn2+ is bonded in a 6-coordinate geometry to six Cl1- atoms. There are three shorter (2.72 Å) and three longer (3.13 Å) Sn–Cl bond lengths. In the second Sn2+ site, Sn2+ is bonded to four Cl1- atoms to form distorted SnCl4 trigonal pyramids that share corners with three equivalent WCl6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are one shorter (2.42 Å) and three longer (3.06 Å) Sn–Cl bond lengths. There are six inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn2+ atom. In the second Cl1- site, Cl1- is bonded in a 12-coordinate geometry to three equivalent W+3.33+ atoms. In the third Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent W+3.33+ atoms. In the fourth Cl1- site, Cl1- is bonded in a 2-coordinate geometry to one W+3.33+ and one Sn2+ atom. In the fifth Cl1- site, Cl1- is bonded in a water-like geometry to one W+3.33+ and one Sn2+ atom. In the sixth Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one W+3.33+ and one Sn2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnS8(N2Cl)4 by Materials Project

SnCl4(NS)8 crystallizes in the orthorhombic Pca2_1 space group. The structure is zero-dimensional and consists of eight 1,3,5,7,2,4,6,8-tetrathiatetrazocane molecules and four tin tetrachloride molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SnCNCl3 by Materials Project

SnCl2CNCl crystallizes in the monoclinic Pc space group. The structure is two-dimensional and consists of two cyanogen chloride molecules and one SnCl2 sheet oriented in the (0, 1, 0) direction. In the SnCl2 sheet, Sn2+ is bonded to four Cl1- atoms to form distorted corner-sharing SnCl4 tetrahedra. There are a spread of Sn–Cl bond distances ranging from 2.59–2.98 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a bent 150 degrees geometry to two equivalent Sn2+ atoms. In the second Cl1- site, Cl1- is bonded in a linear geometry to two equivalent Sn2+ atoms.

36 MATERIALS SCIENCE↗
NASA NTRS1992

An ultra-sensitive coherent detector capable of single photon detection for lidar applications

The properties of Ultra-Sensitive Coherent Detectors (USCD's) are nearly that of an ideal detector for lidar applications. Recent progress in the development of USCD's is briefly reviewed, and its imaging capability is demonstrated. These new detectors possess properties with significant improvements over conventional technology. These improvements include a high quantum efficiency of 0.95, gain in excess of 10 exp 13, a narrow bandwidth of 180-300 MHz at 1 micron, imaging capability, and phase conjugation ability. We have constructed a USCD using two Nd:YAG laser amplifiers and a four-wave Brillouin mirror (FWBM) using SnCl4 as the Brillouin medium. Using a 10 Hz repetitively-pulsed single frequency laser, we have shown that the Brillouin medium is free from thermal blooming and from optical breakdown.

Amimoto, Sherwin↗
NASA NTRS1994

Electrically conducting polyimide film containing tin complexes

Disclosed is a thermally-stable SnO2-surfaced polyimide film wherein the electrical conductivity of the SnO2 surface is within the range of about 3.0 x 10(exp -3) to about 1 x 10(exp -2) ohms(exp -1). Also disclosed is a method of preparing this film from a solution containing a polyamic acid and SnCl4 (DMSO)2.

St.clair, Anne K.↗
NASA NTRS2007

Intermediate Temperature Fluids Life Tests - Experiments

There are a number of different applications that could use heat pipes or loop heat pipes (LHPs) in the intermediate temperature range of 450 to 725 K (170 to 450 C), including space nuclear power system radiators, fuel cells, and high temperature electronics cooling. Historically, water has been used in heat pipes at temperatures up to about 425 K (150 C). Recent life tests, updated below, demonstrate that titanium/water and Monel/water heat pipes can be used at temperatures up to 550 K (277 C), due to water's favorable transport properties. At temperatures above roughly 570 K (300 C), water is no longer a suitable fluid, due to high vapor pressure and low surface tension as the critical point is approached. At higher temperatures, another working fluid/envelope combination is required, either an organic or halide working fluid. An electromotive force method was used to predict the compatibility of halide working fluids with envelope materials. This procedure was used to reject aluminum and aluminum alloys as envelope materials, due to their high decomposition potential. Titanium and three corrosion resistant superalloys were chosen as envelope materials. Life tests were conducted with these envelopes and six different working fluids: AlBr3, GaCl3, SnCl4, TiCl4, TiBr4, and eutectic diphenyl/diphenyl oxide (Therminol VP-1/Dowtherm A). All of the life tests except for the GaCl3 are ongoing; the GaCl3 was incompatible. As the temperature approaches 725 K (450 C), cesium is a potential heat pipe working fluid. Life tests results are also presented for cesium/Monel 400 and cesium/70-30 copper/nickel heat pipes operating near 750 K (477 C). These materials are not suitable for long term operation, due to copper transport from the condenser to the evaporator.

Anderson, William G.↗