STUDIES OF URANIUM MINERALS. XXIII. TORBERNITE, ZEUNERITE AND URANOSPHERITE

Journal Article · Fri Nov 01 04:00:00 EST 1957 · Am. Mineralogist

OSTI ID:4339904

Berman, R

Nov.- Bec. An attempt was made to synthesize the fully hydrated (8 to 12 H/sub 2/O) form of torbernite. Under the petrographic microscope the precipitate was found to be microcrystalline, with low birefringence and extinction visible on some of the grains. The d-spacings are analogous to the spacings of fully hydrated zeunerite and autunite and to less hydrated species of torbernite group. The zeunerite is the arsenate analogue of torbernite. Some specimens of green crystals identified as zeunerite from Weisser Hirsch mine, Schneeberg, Saxony were studied in comparison to artificial torbernite and materials from the Dexter mine, San Rafael Swell, Utah. The uranospherite is a secondary mineral formed with various arsenates in the oxidized zone of a vein (Weisser Hirsch mine near Scheeberg, Saxony) carrying uraninite, natural bismuth, and cobalt-nickel arsenides. The mineral is a hydroxide or hydrated oxide of bismuth and hexavalent uranium, its formula is uncertain. The specimen was studied as to optical properties. (R.V. J.)

• Research Organization: Harvard Univ., Cambridge Mass.; and U.S. Geological Survey, Washington
• NSA Number: NSA-12-004013
• OSTI ID: 4339904
• Journal Information: Am. Mineralogist, Journal Name: Am. Mineralogist Vol. Vol: 42
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ARSENIC
AUTUNITE
BISMUTH
COBALT
COLOR
CRYSTALS
DIFFRACTION
GERMANY
HYDROXIDES
LATTICES
LUMINESCENCE
MICROSCOPY
NICKEL
PETROGRAPHY
PHYSICS
PRECIPITATION
PREPARATION
REFRACTION
ROCKS
TORBERNITE
URANINITES
URANIUM MINERALS
URANOSPHERITE
ZEUNERITE