The crystal structure of Ba-5(OsO5)(3)NO3 is described. It crystallizes in
an apatite-like structure, space group P6(3)cm, a = 11.101(1) Angstrom, c =
7.815(1) Angstrom, V = 834.0(2) Angstrom (3), Z = 2, P-calc = 6.208 Mg .m(
-3). The structure is isomorphous with Ba-5(OsO5)(3)Cl and Ba-5(ReO5)(3)NO3
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