The tantalum‐silicon, molybdenum‐silicon, and tungsten‐silicon systems have been investigated for solid phases stable above 1900 °K. Three new tantalum silicide phases, two new molybdenum silicide phases, and one new tungsten silicide phase are reported besides the MSi 2 phases previously known. The crystal structure of MO 3 S is described. Lower limits for eutectic temperatures are given for these three systems, and the relative stabilities of metallic silicides of groups III through VII are discussed.
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Brewer et al. (1950) studied this question.
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