BARYTOCALCITE
This article appears in Volume V03, Page 457 of the Encyclopedia Britannica.
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Encyclopedia Britannica - Main :: BAR-BEC
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BARYTOCALCITE , a rare mineral found only at Alston Moor in Cumberland , where it occurs as diverging groups of white 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)
transparent crystals lining cavities in the Mountain Limestone.
The crystals belong to the monoclinic system and are usually prismatic or blade-shaped in habit. The hardness is 4, and the sp. gr. 3.65. There are perfect cleavages parallel to the prism faces inclined at an angle of 73 6', and a less perfect cleavage
parallel to the basal plane, the angle between which and the prism faces is 770 6'; the angles between these three cleavages thus approximate to the angles (740 55') between the three cleavages of calcite, and there are other points of superficial resemblance between these two minerals. Chemically, barytocalcite is a double salt of barium and calcium carbonates, BaCa(CO3)2, thus differing
from the orthorhombic bromlite (q.v.) which is an isomorphous mixture of the two carbonates. (L. J. S.)
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