Cu2Th4(MoO4)(9) is cubic: a=14.4856(1) Angstrom, space group <I(4)over
bar 3d>, Z=4. Its crystal structure was recently determined using a s
ingle crystal. The results of chemical study allow one to reject the e
xistence of Li4Th7(MO4)(16) and La(MO4)(ReO4) compounds with M=Mo, W,
reported as isostructural with Cu2Th4(MoO4)(9). Precise X-ray powder p
atterns are established for Cu2Th4(MoO4)(9) and isotypic compounds Li2
Th4(MoO4)(9), Li2Th4(WO4)(9), and La-4(MoO4)(3)(ReO4)(6). (C) 1998 Int
ernational Centre for Diffraction Data. [S0885-7156(98)00101-8].