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单词 phosphorite
释义

phosphorite /'fɒsfəraɪt//'fɑsfə,raɪt/

英汉-汉英词典
n. 磷灰石,磷矿
词组 | 习惯用语
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  • phosphorus n. 磷
  • phosphide n. 磷化物
  • phosphatase n. [生化]磷酸酶
  • phosphoric adj. 磷的(尤指含五价磷的),含磷的
phosphorite n. 磷灰石;[岩] 磷钙土

网络短语:
carbonate phosphorite 碳酸盐型磷矿
micritic phosphorite 泥晶磷块岩
biologic phosphorite 生物磷灰岩
ground phosphorite 磷矿粉;磷灰石粉
Rudaceous phosphorite 中国风台的砾状磷块岩
phosphorite nodule 磷质结核
glauconite phosphorite 海绿石磷块岩
phosphorite flotation 磷矿浮选
uranium-bearing phosphorite 含铀磷块岩
英语百科

Phosphorite

Guano mining in the Central Chinchua Islands.
Peloidal phosphorite, Phosphoria Formation, Simplot Mine, Idaho. 4.6 cm wide.
Fossiliferous peloidal phosphorite, (4.7 cm across), Yunnan Province, China.
Phosphorite mine near Oron, Negev, Israel.

Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock which contains high amounts of phosphate bearing minerals. The phosphate content of phosphorite is at least 15 to 20%; if it is assumed that the phosphate minerals in phosphorite are hydroxyapatite and fluoroapatite, phosphate minerals contain roughly 18,5 % phosphorus by weight and if phosphorite contains around 20% of these minerals, phosphorite is roughly 3,7 % phosphorus by weight, which is a considerable enrichment over the typical sedimentary rock content of less than 0.2%. The phosphate is present as fluorapatite Ca5(PO4)3F (CFA) typically in cryptocrystalline masses (grain sizes < 1 μm) referred to as collophane. It is also present as hydroxyapatite Ca5(PO4)3OH or Ca10(PO4)6(OH)2, which is often dissolved from vertebrate bones and teeth, whereas fluorapatite can originate from hydrothermal veins. Other sources also include chemically dissolved phosphate minerals from igneous and metamorphic rocks. Phosphorite deposits often occur in extensive layers, which cumulatively cover tens of thousands of square kilometres of the Earth's crust.

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