“serpentine”的概念、定义、翻译、参考文献-科学参考

serpentine

Chemistry

Any of a group of hydrous magnesium silicate minerals with the general composition Mg₃Si₂O₅(OH)₄. Serpentine is monoclinic and occurs in two main forms: chrysotile, which is fibrous and the chief source of asbestos; and antigorite, which occurs as platy masses. It is generally green or white with a mottled appearance, sometimes resembling a snakeskin – hence the name. It is formed through the metamorphic alteration of ultrabasic rocks rich in olivine, pyroxene, and amphibole. Serpentinite is a rock consisting mainly of serpentine; it is used as an ornamental stone.

Geology and Earth Sciences

A group of minerals belonging to the 1:1 group of phyllosilicates (sheet silicates) with the composition Mg₆[Si₄O₁₀](OH)₈ and including the minerals chrysotile (the asbestiform variety), lizardite, and antigorite; sp. gr. 2.55–2.60; hardness 2.0–3.5; monoclinic; chrysotile is fibrous whereas lizardite and antigorite occur as flat tabular crystals or massive; various shades of green, also brown, grey-white, or yellow; greasy to waxy lustre, occasionally silky; formed from altered olivine and orthopyroxene. It results from the alteration of ultramafic (see ultrabasic) rocks either by hydrothermal action at a late stage or by alteration during metamorphism, chrysotile forming first and then altering to antigorite; it is a constituent of ophicalcites, a serpentine-calcite rock derived from the dedolomitization (see dedolomite) of a siliceous dolomite. It is used extensively as a facing stone and for ornament; chrysotile has been used as a source of commercial asbestos in Thetford, Canada. Lizardite occurs on the Lizard Peninsula, Cornwall, UK.

单词	serpentine
释义	serpentine Chemistry Any of a group of hydrous magnesium silicate minerals with the general composition Mg₃Si₂O₅(OH)₄. Serpentine is monoclinic and occurs in two main forms: chrysotile, which is fibrous and the chief source of asbestos; and antigorite, which occurs as platy masses. It is generally green or white with a mottled appearance, sometimes resembling a snakeskin – hence the name. It is formed through the metamorphic alteration of ultrabasic rocks rich in olivine, pyroxene, and amphibole. Serpentinite is a rock consisting mainly of serpentine; it is used as an ornamental stone. Geology and Earth Sciences A group of minerals belonging to the 1:1 group of phyllosilicates (sheet silicates) with the composition Mg₆[Si₄O₁₀](OH)₈ and including the minerals chrysotile (the asbestiform variety), lizardite, and antigorite; sp. gr. 2.55–2.60; hardness 2.0–3.5; monoclinic; chrysotile is fibrous whereas lizardite and antigorite occur as flat tabular crystals or massive; various shades of green, also brown, grey-white, or yellow; greasy to waxy lustre, occasionally silky; formed from altered olivine and orthopyroxene. It results from the alteration of ultramafic (see ultrabasic) rocks either by hydrothermal action at a late stage or by alteration during metamorphism, chrysotile forming first and then altering to antigorite; it is a constituent of ophicalcites, a serpentine-calcite rock derived from the dedolomitization (see dedolomite) of a siliceous dolomite. It is used extensively as a facing stone and for ornament; chrysotile has been used as a source of commercial asbestos in Thetford, Canada. Lizardite occurs on the Lizard Peninsula, Cornwall, UK.
随便看	fritillary Fritsch, Felix Eugen Fritsch, Gustav Theodor fritterware Frizzled Frobenius endomorphism Frobenius, (Ferdinand) Georg (1849–1917) Frobenius normal form Froehde’s test frog frogs Froissart, Jean (1337–) from above, from the right from below, from the left frond Fronde Fronian front frontal arc frontal fog frontal lobe frontal wave frontal zone Front de Libération nationale Frontenac, Louis de Buade, comte de (1622–98)