Some observations on rutherfordine

Joan R. Clark; C. L. Christ

doi:10.3133/tei584

Some observations on rutherfordine

Trace Elements Investigations 584

By: Joan R. Clark and C. L. Christ

https://doi.org/10.3133/tei584

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Abstract

The optical properties of rutherfordine, UO₂CO₃, previously determined on microscopic crystals, have been redetermined on considerably larger crystals; and the relations among the indices of refraction, the morphology, and the crystal structure have been examined. Rutherfordine is orthorhombic, biaxial positive, with α = 1.715, β = 1.730, γ = 1.795, 2V = 53° (calc.); X = b, Y = c (elongation, Z = a. The crystal structure of UO₂CO ₃ consists of layers of carbonate groups parallel to (010) with linear (O-U-O) ions normal to the layers. The indices β and γ correspond to vibration directions parallel to layers; the unexpectedly large difference in value between β and γ is ascribed to the optical anisotropy of the uranium-oxygen bonding in the layer. Indexed X-ray powder data are given.

Additional publication details
Publication type	Report
Publication Subtype	USGS Numbered Series
Title	Some observations on rutherfordine
Series title	Trace Elements Investigations
Series number	584
DOI	10.3133/tei584
Year Published	1956
Language	English
Publisher	U.S. Geological Survey
Description	13 p.
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