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crystal data
Transparent and light brownish single crystals of Pb5GeO7 were grown from a melt of composition 4.8PbO.GeO2 by spontaneous crystallization. The compound melts incongruently at 1014 K. The unit cell is orthorhombic with lattice constants a = 9.296 (2), b = 11.546 (2), c = 17.298 (5) Å; Dm (293 K) = 8.63 (4), Dx = 8.734 Mg m-3 for Z = 8. The space group is Pbca. Indexed X-ray powder data are given.