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硬石膏
1. anhydrite
2. AnhydriteAnhydrite is a mineral – anhydrous calcium sulfate, CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the orthorhombic barium and strontium sulfates, as might be expected from the chemical formulas. Distinctly developed crystals are somewhat rare, the mineral usually presenting the form of cleavage masses. The hardness is 3.5 and the specific gravity 2.9.
Read “Anhydrite” on English Wikipedia
Read “硬石膏” on Japanese Wikipedia
Read “Anhydrite” on DBpedia
Read “Anhydrite” on English Wikipedia
Read “硬石膏” on Japanese Wikipedia
Read “Anhydrite” on DBpedia
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