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New Pyrochlore Pb 2 II [In 0.5 Sb 1.5 ]O 6.5
Author(s) -
Cascales C.,
Rasines I.
Publication year - 1985
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19855291029
Subject(s) - pyrochlore , antimony , crystallography , oxygen , analytical chemistry (journal) , oxygen atom , chemistry , materials science , mineralogy , inorganic chemistry , molecule , organic chemistry , chromatography , phase (matter)
From the study of the hypothetical series Pb 2 II [Pb 2+2p–2c IV In c–2p Sb c ]O 6+p (O ⪕ p < 1; 0 ⪕ c < 2), the existence of the cubic pyrochlore Pb 2 II [In 0.5 Sb 1.5 ]O 6.5 has been established. This compound was obtained as an orange yellow powder, S.G. Fd 4 m (No. 227), Z = 8, a = 10.5892(1) Å, V = 1187.38(3) Å 3 , D c = 8.48 M gm −3 . For Pb in 16(c) positions, In and Sb (1:3) randomly distributed in 16(d), oxygen atoms in 48(f) and in a half of the 8(a) sites, and oxygen positional parameter x = 0.429 (origin at center, 3 m), R = 0.062. The apparent interatomic distances (Å) are determined: PbO = 2.612; (In, Sb)O = 2.019.