Clinohumite

Two intergrown crystals (1.5 x 1 x 0.5 cm) from Koksha Valley, Badakhshan Province, Afghanistan

Crystal structure of clinohumite in polyhedral representation, a-axis projection, b-horizontal. H atom are blue spheres.

Clinohumite is an uncommon member of the humite group, a magnesium silicate according to the chemical formula (Mg,Fe)₉(SiO₄)₄(F,OH)₂. The formula can be thought of as four olivine (Mg₂SiO₄), plus one brucite (Mg(OH)₂). Indeed, the mineral is essentially a hydrated olivine and occurs in altered ultramafic rocks and carbonatites. Most commonly found as tiny indistinct grains, large euhedral clinohumite crystals are sought by collectors and occasionally fashioned into bright, yellow-orange gemstones. Only two sources of gem-quality material are known: the Pamir Mountains of Tajikistan, and the Taymyr region of northern Siberia. It is one of two humite group minerals that have been cut into gems, the other being the much more common chondrodite.

单词	clinohumite
释义	clinohumite /ˌklainəu'hju:mait/ 英汉-汉英词典 n. 斜硅镁石词组 \| 习惯用语您要查找的是不是： humiliate vt. 使 ... 蒙羞；使丢脸 masculinity n. 男性；男子气 clinometer n. 测角器,倾斜仪 Binghamton 宾厄姆顿 clinohumite n. [矿物] 斜硅镁石网络短语: clinohumite ą 钭硅镁石 clinohumite E 钭硅镁石英语百科 Clinohumite Clinohumite is an uncommon member of the humite group, a magnesium silicate according to the chemical formula (Mg,Fe)₉(SiO₄)₄(F,OH)₂. The formula can be thought of as four olivine (Mg₂SiO₄), plus one brucite (Mg(OH)₂). Indeed, the mineral is essentially a hydrated olivine and occurs in altered ultramafic rocks and carbonatites. Most commonly found as tiny indistinct grains, large euhedral clinohumite crystals are sought by collectors and occasionally fashioned into bright, yellow-orange gemstones. Only two sources of gem-quality material are known: the Pamir Mountains of Tajikistan, and the Taymyr region of northern Siberia. It is one of two humite group minerals that have been cut into gems, the other being the much more common chondrodite.
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clinohumite /ˌklainəu'hju:mait/

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网络短语:

Clinohumite