Montroseite, a new vanadium oxide from the Colorado plateaus

Alice D. Weeks; Evelyn A. Cisney; Alexander M. Sherwood

doi:10.3133/tei335

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

By: Alice D. Weeks, Evelyn A. Cisney, and Alexander M. Sherwood

https://doi.org/10.3133/tei335

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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(D_2h¹⁶).

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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
DOI	10.3133/tei335
Year Published	1953
Language	English
Publisher	U.S. Geological Survey
Description	14 p.
Country	United States
State	Colorado;Utah
Other Geospatial	Colorado Plateaus
Google Analytic Metrics	Metrics page