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Montroseite, a new vanadium oxide from the Colorado plateaus

Trace Elements Investigations 335

This report concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission
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Abstract

Montroseite, a new vanadium mineral named from Montrose County, Colorado, has been found in four mines in western Colorado and in two mines in eastern Utah. It is black, opaque, submetallic, and occurs in microscopic bladed crystals of the orthorhombic dipyramidal class. The axial ratio is a:b:c = 0.509:1:0.310, the common forms are b {010}, m {110}, p {121}, and a large vicinal form is approximately {0, 10, 1}. The observed specific gravity is 4.0 and the calculated specific gravity is 4.15. The composition is essentially VO(OH), with some iron commonly substituted for vanadium. Partial oxidation to VO2 has taken place. Chemical analyses and X-ray diffraction data are given. Single crystal study indicated that the space group symmetry is Pbnm(D2h16).

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Montroseite, a new vanadium oxide from the Colorado plateaus
Series title:
Trace Elements Investigations
Series number:
335
Year Published:
1953
Language:
English
Publisher:
U.S. Geological Survey
Description:
14 p.
Number of Pages:
15
Country:
United States
State:
Colorado;Utah
Other Geospatial:
Colorado Plateaus