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DIASPORE , a native See also:aluminium hydroxide, AlO(OH), crystallizing in the orthorhombic See also:system and isomorphous with See also:gothite and See also:manganite. It occurs sometimes as flattened crystals, but usually as lamellar or scaly masses, the flattened See also:surface being a direction of perfect cleavage on which the lustre is markedly pearly in See also:character. It is colourless or greyish-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, yellowish, sometimes See also:violet in See also:colour, and varies from translucent to
transparent. It may be readily distinguished from other colour-less transparent minerals, with a perfect cleavage and pearly lustre—mica, See also:talc, See also:brucite, gypsum—by its greater hardness of 62-7. The specific gravity is 3.4. When heated before the See also:blowpipe it decrepitates violently, breaking up into white pearly scales; it was because of this See also:property that the See also:mineral was named diaspore by R. J. Hairy in 18or, from Stavreipew, " to scatter." The mineral occurs as an alteration product of See also:corundum or See also:emery, and is found in granular See also:limestone and other crystalline rocks. Well-See also:developed crystals are found in the emery deposits of the Urals and at See also:Chester, See also:Massachusetts, and in See also:kaolin at Schemnitz in See also:Hungary. If obtainable in large quantity it would be of economic importance as a source of alumina. (L. J.
End of Article: DIASPORE
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