“malachite”的概念、定义、翻译、参考文献-科学参考

malachite

Chemistry

A secondary mineral form of copper carbonate-hydroxide, CuCO₃.Cu(OH)₂. It is bright green and crystallizes in the monoclinic system but usually occurs as aggregates of fibres or in massive form. It is generally found with azurite in association with the more important copper ores and is itself mined as an ore of copper (e.g. in Zaïre). It is also used as an ornamental stone and as a gemstone.

Geology and Earth Sciences

Mineral, Cu₂CO₃(OH)₂; sp. gr. 3.9–4.0; hardness 3.5–4.0; monoclinic; bright green; pale green streak; in fibrous condition with a silky lustre, crystals with adamantine or vitreous lustre; crystals very rare, and it is usually found as botryoidal, encrusting masses with bands of varying colour, and frequently in a fibrous, radiating habit; common secondary mineral in the oxidized zone of copper deposits, associated with azurite, native copper, and cuprite; soluble with effervescence in dilute hydrochloric acid. It is often used for ornaments and pigments, and as an ore mineral for copper. See spessartite.

单词	malachite
释义	malachite Chemistry A secondary mineral form of copper carbonate-hydroxide, CuCO₃.Cu(OH)₂. It is bright green and crystallizes in the monoclinic system but usually occurs as aggregates of fibres or in massive form. It is generally found with azurite in association with the more important copper ores and is itself mined as an ore of copper (e.g. in Zaïre). It is also used as an ornamental stone and as a gemstone. Geology and Earth Sciences Mineral, Cu₂CO₃(OH)₂; sp. gr. 3.9–4.0; hardness 3.5–4.0; monoclinic; bright green; pale green streak; in fibrous condition with a silky lustre, crystals with adamantine or vitreous lustre; crystals very rare, and it is usually found as botryoidal, encrusting masses with bands of varying colour, and frequently in a fibrous, radiating habit; common secondary mineral in the oxidized zone of copper deposits, associated with azurite, native copper, and cuprite; soluble with effervescence in dilute hydrochloric acid. It is often used for ornaments and pigments, and as an ore mineral for copper. See spessartite.
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