|
VANADINITE , a See also:mineral consisting of See also:lead chloro-vanadate, (PbCl)Pb4(VO4)3, crystallizing in the hexagonal See also:system and isomorphous with See also:pyromorphite and See also:mimetite (q.v.). The crystals are usually six-sided prisms terminated by the basal planes, but are sometimes modified by numerous pyramidal planes which exhibit parallel hemihedrism. Rounded crystals and See also:groups also occur. The See also:colour is usually See also:light See also:- BROWN
- BROWN, CHARLES BROCKDEN (1771-181o)
- BROWN, FORD MADOX (1821-1893)
- BROWN, FRANCIS (1849- )
- BROWN, GEORGE (1818-188o)
- BROWN, HENRY KIRKE (1814-1886)
- BROWN, JACOB (1775–1828)
- BROWN, JOHN (1715–1766)
- BROWN, JOHN (1722-1787)
- BROWN, JOHN (1735–1788)
- BROWN, JOHN (1784–1858)
- BROWN, JOHN (1800-1859)
- BROWN, JOHN (1810—1882)
- BROWN, JOHN GEORGE (1831— )
- BROWN, ROBERT (1773-1858)
- BROWN, SAMUEL MORISON (1817—1856)
- BROWN, SIR GEORGE (1790-1865)
- BROWN, SIR JOHN (1816-1896)
- BROWN, SIR WILLIAM, BART
- BROWN, THOMAS (1663-1704)
- BROWN, THOMAS (1778-1820)
- BROWN, THOMAS EDWARD (1830-1897)
- BROWN, WILLIAM LAURENCE (1755–1830)
brown or yellow, but crystals from See also:Arizona are See also:bright red. Owing to isomorphous replacement of the See also:vanadium by See also:phosphorus and See also:arsenic, the specific gravity varies from 6.6 to 7•2; a variety containing much arsenic is called endlichite. The hardness is 3. The mineral is one of secondary formation in See also:veins of lead ore. It was first found in See also:Mexico, and in 1801 was asserted to contain a new See also:element, which was called " erythronium "; this was later proved to be identical with the subsequently discovered element vanadium. Other well-known localities are Wanlockhead in See also:Dumfriesshire, Kappel (Eisen-Kappel), near See also:Klagenfurt in See also:Carinthia, Arizona and New Mexico. (L. J.
End of Article: VANADINITE
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!