Columbite Jesse Russell

ISBN: 9785510773538

Published: June 15th 2012

Paperback

166 pages


Description

Columbite  by  Jesse Russell

Columbite by Jesse Russell
June 15th 2012 | Paperback | PDF, EPUB, FB2, DjVu, audiobook, mp3, ZIP | 166 pages | ISBN: 9785510773538 | 3.31 Mb

High Quality Content by WIKIPEDIA articles! Columbite, also called niobite, niobite-tantalite and columbate, is a black mineral group that is an ore of niobium and tantalum. It has a submetallic luster and a high density and is a niobate of iron andMoreHigh Quality Content by WIKIPEDIA articles! Columbite, also called niobite, niobite-tantalite and columbate, is a black mineral group that is an ore of niobium and tantalum. It has a submetallic luster and a high density and is a niobate of iron and manganese, containing tantalate of iron.

This mineral group was first found in Haddam, USA. It forms a series with the tantalum-dominant analogue ferrotantalite and one with the manganese-dominant analogue manganocolumbite. The iron-rich member of the columbite group is ferrocolumbite. Some tin and tungsten may be present in the mineral. Yttrocolumbite is the yttrium-rich columbite with the formula (Y, U, Fe)(Nb, Ta)O4. It is a radioactive mineral found in Mozambiqu



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