CRYSTAL-GROWTH AND PROPERTIES OF AG7-XTASE6-XIX (0 LESS-THAN-OR-EQUAL-TO X LESS-THAN-OR-EQUAL-TO 1)

A series of argyrodite compounds with the formula Ag7-xTaSe6-xIx (0 less-than-or-equal-to x less-than-or-equal-to 1) have been prepared for the first time by a sealed silica tube method. Single crystals have been obtained by heating at 800-degrees-C for 2 weeks. Their morphology and crystal structure have been studied by reflected-light microscopy, SEM, EDAX and X-ray diffraction. The silver ionic conductivities of the samples have been also measured.