Vladimirite

Vladimirite is a rare calcium arsenate mineral with a formula of Ca₅(HAsO₄)₂(AsO₄)₂·5H₂O. It is named after the Vladimirovskoye deposit in Russia, where it was discovered in the 1950s.

Vladimirite is monoclinic-prismatic, which means crystallographically, it contains three axes of unequal length and the angles between two of the axes are 90 degrees, and one is less than 90 degrees. It belongs to the space group P2₁/c. The mineral also has an orthorhombic polytype. In terms of its optical properties, vladimirite is anisotropic which means the velocity of light varies depending on direction through the mineral. Relief is a diagnostic characteristic of a mineral in plane polarized light that refers to the various ways different minerals "stand out". Vladimirite's calculated relief is 1.65-1.661, which is moderate. It is colorless in plane polarized light, and it is weakly pleochroic. Pleochroism is the variety of colors under plane polarized light displayed by crystals at various angles.

单词	vladimirite
释义	vladimirite 英汉-汉英词典 n. 针水砷钙石词组 \| 习惯用语您要查找的是不是： voltmeter n. 伏特计 Vladimir n. 弗拉基米尔（古罗斯弗拉基米尔-苏兹达里公国的古都）网络短语: vladimirite 针水砷钙石英语百科 Vladimirite Vladimirite is a rare calcium arsenate mineral with a formula of Ca₅(HAsO₄)₂(AsO₄)₂·5H₂O. It is named after the Vladimirovskoye deposit in Russia, where it was discovered in the 1950s. Vladimirite is monoclinic-prismatic, which means crystallographically, it contains three axes of unequal length and the angles between two of the axes are 90 degrees, and one is less than 90 degrees. It belongs to the space group P2₁/c. The mineral also has an orthorhombic polytype. In terms of its optical properties, vladimirite is anisotropic which means the velocity of light varies depending on direction through the mineral. Relief is a diagnostic characteristic of a mineral in plane polarized light that refers to the various ways different minerals "stand out". Vladimirite's calculated relief is 1.65-1.661, which is moderate. It is colorless in plane polarized light, and it is weakly pleochroic. Pleochroism is the variety of colors under plane polarized light displayed by crystals at various angles.
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vladimirite

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Vladimirite