Materials Data on Al9Co2 by Materials Project

Abstract

Al9Co2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Co is bonded in a 9-coordinate geometry to nine Al atoms. There are a spread of Co–Al bond distances ranging from 2.38–2.53 Å. There are five inequivalent Al sites. In the first Al site, Al is bonded in a distorted linear geometry to two equivalent Co atoms. In the second Al site, Al is bonded in a 2-coordinate geometry to two equivalent Co atoms. In the third Al site, Al is bonded in a distorted bent 150 degrees geometry to two equivalent Co atoms. In the fourth Al site, Al is bonded in a distorted bent 120 degrees geometry to two equivalent Co atoms. In the fifth Al site, Al is bonded in a 2-coordinate geometry to two equivalent Co atoms.