1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ANHYDRITE, a mineral, differing chemically from the more commonly occurring gypsum in containing no water of cryitallization, being anhydrous calcium sulphate, CaSO,. It crystallizes in the orthorhombic system, and has three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the orthorhombic barium and strontium sulphates, as might be expected from the chemical formulae. Distinctly developed crystals are somewhat rare, the mineral usually presenting the form of cleav…
- Source status
- OCR text aligned to scanned pages
- Pages
- Vol. 2, pp. 47-47