|
SODALITE , a See also:group of See also:rock-forming minerals comprising the following isomorphous See also:species:
Sodalite . Na4(AICI) Alz (SiO4) 3
Hatlynite (Naz, Ca)z(NaSO4.Al)Alz(SiOs)s
Noselite Na4(NaSO4•Al)Alz (SiO4)1
Lazurite Na4(NaSz•Al)AIz(SiO4) 3
They are thus See also:sodium (or See also:calcium) See also:aluminium silicates, with chloride, sulphate or sulphide. In their orthosilicate formulae, as above written, and in their cubic crystalline See also:form they See also:present a certain resemblance to the members of the See also:garnet group. Crystals usually have the form of the rhombic See also:dodecahedron, and are often twinned with interpenetration on an octahedral See also:plane. They are 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, or often See also:blue in See also:colour, and have a vitreous lustre. The hardness is 51, and the specific gravity 2.2-2.4. These minerals are characteristic constituents of igneous rocks See also:rich in soda, and they also occur in metamorphic limestones.
The species sodalite (so named because it contains soda) occurs as well-formed, colourless crystals in the ejected See also:limestone blocks of See also:Monte Somma, See also:Vesuvius, and in the sodalite-See also:syenite of Julianehaab in See also:south See also:Greenland. Massive blue material is See also:common in the elaeolite-syenites of See also:southern See also:Norway, Gyergyo-Ditr6 in Transylvania, Miyask in the Urals, See also:Litchfield in See also:Maine, See also:Dungannon in See also:Ontario, See also:Ice See also:river in Kootenay See also:county, See also:British See also:Columbia, &c.; at the three last-named localities it is found as large masses of a See also:bright See also:sky-blue colour and suitable for cutting as an ornamental See also:- STONE
- STONE (0. Eng. shin; the word is common to Teutonic languages, cf. Ger. Stein, Du. steen, Dan. and Swed. sten; the root is also seen in Gr. aria, pebble)
- STONE, CHARLES POMEROY (1824-1887)
- STONE, EDWARD JAMES (1831-1897)
- STONE, FRANK (1800-1859)
- STONE, GEORGE (1708—1764)
- STONE, LUCY [BLACKWELL] (1818-1893)
- STONE, MARCUS (184o— )
- STONE, NICHOLAS (1586-1647)
stone. Recently, large masses with a See also:pink colour, which quickly fades on exposure to See also:light, have been met with in elaeolite-See also:pegmatite at See also:Kishangarh in See also:Rajputana. Haiiynite, or hauyne (named after R. J. Flatly), occurs as bright blue crystals and grains in the lavas (See also:phonolite, tephrite, &c.) of Vesuvius, See also:Rome, the See also:Eifel, &c. Noselite, or nosean, is found as greyish crystals in the sanidine bombs of the Eifel. Lazurite is an important constituent, together with some haiiynite and sodalite, of lapis-lazuli (q.v.). (L: J.
End of Article: SODALITE
Additional information and Comments
There are no comments yet for this article.
Please link directly to this article:
Highlight the code below, right click, and select "copy." Then paste it into your website, email, or other HTML.
Site content, images, and layout Copyright © 2006 - Net Industries, worldwide.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are always encouraged.
|
del.icio.us it!