Skip to main content
U.S. flag

An official website of the United States government

Montroseite, a new vanadium oxide from the Colorado plateaus

January 1, 1953

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).

Publication Year 1953
Title Montroseite, a new vanadium oxide from the Colorado plateaus
DOI 10.3133/tei335
Authors Alice D. Weeks, Evelyn A. Cisney, Alexander M. Sherwood
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Trace Elements Investigations
Series Number 335
Index ID tei335
Record Source USGS Publications Warehouse