thumbnail

Some observations on rutherfordine

Trace Elements Investigations 584

By:
and

Links

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
Year Published:
1956
Language:
English
Publisher:
U.S. Geological Survey
Description:
13 p.