P. Gall et P. Gougeon, STRUCTURE OF SRMO5O8 CONTAINING CHAINS OF BIOCTAHEDRAL MO10 CLUSTERS, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 7-9
The title compound, strontium pentamolybdate, is isostructural with La
Mo5O8 and therefore contains bioctahedral Mo10O18 cluster units strong
ly linked by Mo(1)-Mo(1) intercluster bonds of 2.7651 (9) angstrom to
form infinite molybdenum oxide chains. These are interconnected throug
h M-O-Mo bonds to create four-sided channels, in which the Sr2+ cation
s are located. The Mo-Mo distances within the Mo10 cluster lie between
2.6034 (6) and 2.8324 (9) angstrom (average 2.740 angstrom). The Mo-O
distances range between 1.902 (4) and 2.148 (4) angstrom (average 2.0
62 angstrom). The Sr2+ cation is surrounded by ten 0 atoms at distance
s ranging from 2.529 (4) to 2.935 (4) angstrom, with an eleventh 0 ato
m at 3.219 (4) angstrom.