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WOLLASTONITE , a See also: rock-forming See also:mineral consisting of See also:calcium metasilicate, CaSiO3, crystallizing in the See also:monoclinic See also:system and belonging to the See also:pyroxene (q.v.) See also:group. It differs, however, from other members of this group in having cleavages, not parallel to the See also:prism-faces, but in two directions perpendicular to the
See also:plane of symmetry. Crystals are usually elongated parallel to the See also:axis of symmetry and flattened parallel to the ortho-pinacoid, hence the See also:early name " See also:tabular spar "; the name wollastonite is after W. H. See also:Wollaston. The mineral usually occurs in See also:- WHITE
- WHITE, ANDREW DICKSON (1832– )
- WHITE, GILBERT (1720–1793)
- WHITE, HENRY KIRKE (1785-1806)
- WHITE, HUGH LAWSON (1773-1840)
- WHITE, JOSEPH BLANCO (1775-1841)
- WHITE, RICHARD GRANT (1822-1885)
- WHITE, ROBERT (1645-1704)
- WHITE, SIR GEORGE STUART (1835– )
- WHITE, SIR THOMAS (1492-1567)
- WHITE, SIR WILLIAM ARTHUR (1824--1891)
- WHITE, SIR WILLIAM HENRY (1845– )
- WHITE, THOMAS (1628-1698)
- WHITE, THOMAS (c. 1550-1624)
white cleavage masses. The hardness is 5, and the specific gravity 2.85. It is a characteristic product of contact-See also:metamorphism, occurring especially, with See also:garnet, See also:diopside, &c., in crystalline limestones. Crystals are found in the cavities of the ejected See also:limestone blocks of See also:Monte Somma, See also:Vesuvius. At See also:Santa Fe in the See also:State of See also:Chiapas, See also:Mexico, a large rock-See also:mass of wollastonite carries ores of See also:gold and See also:copper: here are found large See also:pink crystals which are often partially or wholly altered to See also:opal. (L. J.
End of Article: WOLLASTONITE
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