“chalcocite”的概念、定义、翻译、参考文献-科学参考

单词	chalcocite
释义	chalcocite Geology and Earth Sciences Mineral, Cu₂S; sp. gr. 5.5–5.8; hardness 2.5–3.0; orthorhombic; dark lead-grey tarnishing to black; black streak; metallic lustre; prismatic and tabular crystals are rare, it is usually found massive, or as powdery coatings; cleavage prismatic, poor; can occur in hydrothermal veins in a primary state, but more usually found in the zones of supergene enrichment of copper orebodies. It is an important ore mineral for copper.
随便看	principle of conservation of linear momentum principle of contained fragments principle of contradiction or noncon-tradiction principle of double effect principle of double negation principle of equivalence principle of excluded fourth principle of excluded middle principle of excluded third principle of explosion principle of included fragments principle of indifference principle of individuation principle of insufficient reason principle of least action principle of least privilege principle of mathematical induction principle of moments principle of non-contradiction principle of non-triviality principle of parsimony principle of plenitude principle of sufficient reason principle of superposition principle of the excluded middle

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