Summary
A single crystal X-ray investigation of yafsoanite resulted ina = 12.632(2) Å, space groupIa3d, cell content 8 × Ca3Te2Zn3O12 (with some Pb for Ca),R = 0.075,wR = 0.028 for 186 independent reflections. Contrary to the results of an earlier investigation, yafsoanite was found to be a garnet type oxide with the atoms Ca, Te(VI) and Zn coordinated to eight, six and four O atoms, respectively.
Zusammenfassung
Eine Einkristall-Röntgenuntersuchung des Yafsoanits ergab:a = 12,632(2) Å, RaumgruppeIa3d, Zellinhalt 8 × Ca3Te2Zn3O12 (mit etwas Pb für Ca),R = 0,075,wR = 0,028 für 186 unabhängige Reflexe. Im Gegensatz zu einer früheren Untersuchung wurde gefunden, daß der Yafsoanit dem Granat-Typ angehört, wobei die Ca-, Te(VI)- und Zn-Atome jeweils von acht, sechs und vier Sauerstoffnachbarn umgeben sind.
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Jarosch, D., Zemann, J. Yafsoanite: a garnet type calcium-tellurium(VI)-zinc oxide. Mineralogy and Petrology 40, 111–116 (1989). https://doi.org/10.1007/BF01164321
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DOI: https://doi.org/10.1007/BF01164321