osmaten.
/ˈɒzmeɪt/, U.S. /ˈɑzˌmeɪt/ Chemistry.
A salt or ester of osmic acid; a salt containing oxyanions of osmium, esp. one containing the anion [OsO2(OH)4]2−. Cf. earlier osmiate n.
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1852 H. B. Jones & A. W. Hoffman Fownes's Man. Elem. Chem. (ed. 4) 368 Osmate of potassa is produced when the metal is fused with nitre.
1909 L. Kahlenberg Outl. Chem. xxxi. 525 The chlorides OsCl2, Os2Cl6, and OsCl4 are known, as are also osmates like K2OsO4.2H2O.
1950 N. V. Sidgwick Chem. Elements II. 1501 The tetroxide reacts with potassium or caesium hydroxide in methyl alcohol to give the tetramethyl osmate (MO)2Osvi(O·CH3)4.
1973 S. E. Livingstone in J. C. Bailar et al. Comprehensive Inorg. Chem. III. xliii. 1230 Potassium osmate, originally formulated as K2OsO4·2H2O, has the octahedral structure K2[OsO2(OH)4].
2003 Inorg. Chem. 42 947 Single crystals of two new osmium-containing triple perovskites, Ba3LiOs2O9 and Ba3NaOs2O9, were grown from reactive molten hydroxide fluxes in sealed silver tubes... The magnetic susceptibility of these osmates indicates significant Os–Os coupling within the octahedra pair.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).
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n.1852