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Crystal Chemistry and Phase Equilibria in the System CdO‐PbO‐O
Author(s) -
KEESTER KENNETH L.,
WHITE WILLIAM B.
Publication year - 1970
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1970.tb11996.x
Subject(s) - isostructural , chemistry , ternary operation , oxide , ternary numeral system , oxygen , phase (matter) , cadmium oxide , crystal structure , oxygen pressure , crystallography , phase diagram , cadmium , analytical chemistry (journal) , organic chemistry , computer science , programming language , chromatography
The subsolidus portion of the system CdO‐PbO‐O was investigated at high temperatures and oxygen pressures in cold‐seal pressure vessels. Specially prepared cadmium hydroxide precipitate was used to achieve reaction equilibria. Two ternary oxide phases exist in the system: Cd 2 PbO 4 is stable under all conditions investigated; CdPb 2 O 5 dissociates (2CdPb 2 O 5 ⇋ Cd 2 PbO4+Pb 3 O 4 +O 2 ). The P‐T univariant curve was mapped. Compatibility triangles illustrate the phase equilibria of the system. Cell constants for Cd 2 PbO 4 are: a 0 =5.671, b 0 =9.902, C 0 = 3.139, all ±0.001 Å. The space group was determined as Pbam ( Pba2 ); Cd 2 PbO 4 is isostructural with the Sr 2 PbO 4 structure type. Derived average metal‐oxygen distances are: Cd–O 2.35 and Pb–O 2.08 Å. The structure of CdPb 2 O 5 is not known.