Mica

云母

Muscovite

Biotite

白云母与生物云母

Mica is a name given to aluminum-containing silicates which cleave in thin sheets. The micas include muscovite (KAl₂(AlSi₃O₁₀)(OH)₂) and biotite (K(Mg,Fe)₃(AlSi₃O₁₀)(OH)₂).

云母是一种含有铝的硅酸盐，其能沿薄片状裂开。云母包括白云母（KAl₂(AlSi₃O₁₀)(OH)₂）和黑云母（K(Mg,Fe)₃(AlSi₃O₁₀)(OH)₂）。

Mindat: Mica

矿物：云母

Muscovite

长石

Muscovite and biotite are aluminum-containing silicates which cleave in thin sheets and are called micas. Muscovite has the general formula (KAl₂(AlSi₃O₁₀)(OH)₂) .

白云母和 biotite 是含有铝的硅酸盐，它们能沿薄片方向裂开，因此被称为云母。白云母的通式为 (KAl₂(AlSi₃O₁₀)(OH)₂)。

Muscovite has a pearly luster and can be clear in thin sheets. In small flakes, it gives sparkle to many rocks.

长石具有珍珠光泽，薄片状时可透明。小片状的长石能使许多岩石显得晶亮。

These samples of muscovite are on display at the Smithsonian Museum of Natural History. The sample at left is 20-30 cm high.

这些金绿石标本陈列在史密森尼自然历史博物馆中。左边的标本高约20-30厘米。

The muscovite sample above is from Sapucaia pegmatite, Minas Gerais, Brazil.

上面的白云母样品来自巴西巴伊亚州萨普基亚伟晶岩。

Mindat's comment about muscovite "The most common of the Mica Group minerals, it is typically found as massively crystalline material in "books" or in flaky grains as a constituent of many rock types. It is clear with a pearly luster on cleavage faces, often having a sparkly look in rocks."

Mindat 对白云母的评论是：‘作为云母族矿物中最常见的种类，它通常以致密结晶的形态出现在‘书’状结构中，或作为许多岩石类型的片状颗粒组成部分。它具有透明的外观，断口处有珍珠光泽，常在岩石中呈现出闪闪发亮的效果。’

This sample of muscovite at right. is from the Diamond mica mine in Keystone, South Dakota. There is also quartz content in the sample. The sample measures about 10 cm.

右侧这块白云母样本来自南达科他州凯斯通的钻石白云母矿。该样本中还含有石英成分。样本尺寸约为10厘米。

This sample of muscovite with quartz and ferberite is about 10x18 cm and is from Panasqueira, Portugal.

这种含石英和铁硼矿的白云母样本尺寸为10x18厘米，来自葡萄牙的潘萨克雷拉。

Muscovite does not always clearly show the sheet structure in its overall appearance. This sample is about 16x18 cm and is from Hoydalen, Tordal, Kragero, Norway.

白云母并不总是在其整体外观中明显表现出层状结构。这块样品尺寸约为16x18厘米，来自挪威克雷格罗的托尔达尔霍伊达尔。

This muscovite sample shows the layered structure, but the formation shows thick plates of the mineral, each of which can be separated into thin layers. This sample has overall size about 11x11 cm and is from Spruce Pine, North Carolina.

这个白云母样品显示出层状结构，但其形成方式是形成较厚的矿物板，每块都可以分离为薄层。该样品总体尺寸约为11x11厘米，来自北卡罗来纳州的Spruce Pine。

This thin sample shows the lighter color of muscovite in the center, surrounded by darker biotite. The sample is about 12x7 cm and is from Spruce Pine, North Carolina.

这个薄样品中心呈现出白云母较浅的颜色，周围则是较暗的黑云母。样品尺寸约为12x7厘米，来自北卡罗来纳州斯普林斯 Pine。

This muscovite sample is about 10 cm across and is from Espera Feliz, Minas Gerais, Brazil. It looks dark like biotite, but is classified as muscovite.

这块石英样品宽约10厘米，采自巴西巴伊亚州的埃斯佩拉·费利兹。它看起来暗淡，类似黑云母，但被归类为石英。

This muscovite sample is about 8 cm across and is from Catawba County, North Carolina.

这块石英样品宽约8厘米，来自北卡罗来纳州的卡塔瓦巴县。

Mindat: Muscovite

Mindat: Muscovite（矿物名）