Biotite
_biote_
 | (K(Mg,Fe)3(AlSi3O10)(OH)2)(K(Mg,Fe)₃(AlSi₃O₁₀)(OH)₂)
Biotite and muscovite are aluminum-containing silicates which cleave in thin sheets and are called micas. Biotite is a general field term for dark micas. Biotite has the general formula (K(Mg,Fe)3(AlSi3O10)(OH)2) . The presence of iron and magnesium in biotite makes it darker in color than muscovite. With a higher crystallization temperature, biotite is viewed as occurring earlier in the Bowen reaction series. Sheetlike layer-silicates are the major constituents of clays and muds. 白云母和biotite都是含铝的硅酸盐，它们以薄片状裂开，被称为云母。biotite是暗色云母的通用术语。biotite的一般化学式为(K(Mg,Fe)3(AlSi3O10)(OH)2)。biotite中含铁和镁，使其颜色比白云母更深。由于结晶温度较高，biotite被认为在Bowen反应系列中形成较早。层状硅酸盐是黏土和泥质岩的主要组成成分。
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| This sample from the Smithsonian Museum of Natural History shows the darker biotite with a center of the lighter muscovite. The sample is from Spruce Pine, North Carolina and is about 11 cm wide.
According to Mindat, biotite is now a discouraged name because it refers to a series of similar minerals from the mica family. The more specific mineral names annite, eastonite, phlogopite and siderophyllite are used in technical literature. 根据Mindat，生物石（biotite）现在被 discouraged，因为它指的是从云母族中一系列相似矿物中的一类。在技术文献中，更具体的矿物名称如安蒂（annite）、埃斯顿（eastonite）、磷灰石（phlogopite）和铁云母（siderophyllite）被使用。
这件来自史密森尼自然历史博物馆的样本显示了暗色的生物云母，其中心是较浅的云母。该样本来自北卡罗来纳州斯普林松 Pine，宽约11厘米。 |  |
Mindat: Biotite
Mindat: 赤铁矿
| Minerals
矿物 |
索引
| HyperPhysics***** Geophysics
HyperPhysics ***** 地球物理学 | R Nave |
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