Hornblende
Ca2(Mg,Fe,Al)5(Si,Al)8O22(OH)2
 | These samples of hornblende are displayed in the Smithsonian Museum of Natural History. Hornblende is one of the basic silicate minerals. Its composition is Ca2(Mg,Fe,Al)5(Si,Al)8O22(OH)2. Hornblende is the most common example of the group of silicates called amphibole. The sample at left is about 12x8 cm and is from Ontario, Canada. 这些角闪石样本陈列在史密森尼自然历史博物馆中。角闪石是一种基本的硅酸盐矿物。其化学式为Ca₂(Mg,Fe,Al)₅(Si,Al)₈O₂₂(OH)₂。角闪石是被称为角闪石类的硅酸盐矿物中最常见的例子。左侧的样本尺寸约为12x8厘米，来自加拿大安大略省。 |
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This sample of hornblende with calcite is from Franklin, New Jersey. It is about 15 cm across. 这种含方解石的角闪石标本来自新泽西州弗兰克林，直径约15厘米。
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This sample of hornblende is from Russell, New York. It is about 5 cm wide. Hornblende has two cleavage directions that intersect at roughly 60° and 120°. It is usually dark green to black in color and is similar to augite. It is commonly found in continental rocks which are igneous in origin. It often makes up the dark part of rocks which are composed of light and dark crystals. 角闪石有两条解理方向，其交角约为60°和120°。它通常呈暗绿色至黑色，与辉石相似。它常见于火成岩的大陆岩石中。它常构成由光矿物和暗矿物组成的岩石中的暗色部分。
Mindat: Hornblende Mindat: 赤铁矿
这种hornblende样本来自纽约的Russell，宽约5厘米。 |
| Minerals
矿物 |
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