WILLEMITE
Online Encyclopedia
Originally appearing in Volume
V28,
Page 658
of the 1911 Encyclopedia Britannica.
WILLEMITE
, a mineral consisting of zinc orthosilicate, Zn2SiO4, crystallizing in the parallel-faced hemihedral class of the rhombohedral system
.
Crystals have the form of hexagonal prisms terminated by rhombohedral planes: there are distinct cleavages parallel to the prism-faces and to the base
.
Granular and cleavage masses are of more common occurrence
.
The colour varies considerably, being colourless, 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)
, greenish-yellow, apple- green, flesh-red, &c
.
The hardness is 52, and the specific gravity 3.9-4.2
.
A variety containing much manganese replacing zinc is called " t:roostite." Willemite occurs at Sterling See also: - HILL
- HILL (0. Eng. hyll; cf. Low Ger. hull, Mid. Dutch hul, allied to Lat. celsus, high, collis, hill, &c.)
- HILL, A
- HILL, AARON (1685-175o)
- HILL, AMBROSE POWELL
- HILL, DANIEL HARVEY (1821-1889)
- HILL, DAVID BENNETT (1843–1910)
- HILL, GEORGE BIRKBECK NORMAN (1835-1903)
- HILL, JAMES J
- HILL, JOHN (c. 1716-1775)
- HILL, MATTHEW DAVENPORT (1792-1872)
- HILL, OCTAVIA (1838– )
- HILL, ROWLAND (1744–1833)
- HILL, SIR ROWLAND (1795-1879)
, Sussex county, and Franklin Furnace in New Jersey, where it is associated with other zinc ores ( franklinite and zincite) in crystalline limestone
.
It has been found at only a few other localities, one of which is near Liege, and for this reason the mineral was named after See also: - WILLIAM
- WILLIAM (1143-1214)
- WILLIAM (1227-1256)
- WILLIAM (1J33-1584)
- WILLIAM (A.S. Wilhelm, O. Norse Vilhidlmr; O. H. Ger. Willahelm, Willahalm, M. H. Ger. Willehelm, Willehalm, Mod.Ger. Wilhelm; Du. Willem; O. Fr. Villalme, Mod. Fr. Guillaume; from " will," Goth. vilja, and " helm," Goth. hilms, Old Norse hidlmr, meaning
- WILLIAM (c. 1130-C. 1190)
- WILLIAM, 13TH
I. of the Nether-lands
.
Under the influence of. radium radiations, willemite fluoresces with a brilliant green colour
.
(L
.
J
.
End of Article: WILLEMITE
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