Ca4As3– a new binary calcium arsenide
2015 ◽
Vol 71
(12)
◽
pp. 1548-1550
Keyword(s):
The crystal structure of the binary compound tetracalcium triarsenide, Ca4As3, was investigated by single-crystal X-ray diffraction. Ca4As3crystallizes in the Ba4P3structure type and is thus a homologue of isotypic Sr4As3. The unit cell contains 32 Ca2+cations, 16 As3−isolated anions and four centrosymmetric [As2]4–dumbbells. The As atoms in each of the dumbbells are connected by a single bond, thus this calcium arsenide is a Zintl phase.