CĂRȚI ÎN ENGLEZĂ ÎN LEGĂTURĂ CU «UMANGITE»
Descoperă întrebuințarea
umangite în următoarea selecție bibliografică. Cărți în legătură cu
umangite și extrase din aceasta pentru a furniza contextul de întrebuințare al acestuia în literatura Engleză.
High Quality Content by WIKIPEDIA articles! Umangite is a copper selenide mineral, Cu3Se2, discovered in 1891. It occurs only in small grains or fine granular aggregates with other copper minerals of the sulfide group.
Jesse Russell, Ronald Cohn, 2012
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The Ore Minerals Under the Microscope: An Optical Guide
Umangite. Geologic Environment: hydrothermal veins Reflection Colour: violetto
greenish Internal Reflections: Reflectance [%]: Anisotropy: Pleochroism: 14.18 -
16.05 very strong, dark to light orange shades Bireflectance: violetto greenish ...
3
Bibliography of the Geology of the Western Phosphate Field
Geologic occurrence, mineralogy, and analyses of berzelianlte, umangite,
naumannite, clausthalite, eucairite, klockmannite, tiemannite, selenolite,
chalcomenite, molybdomenite, cobaltomenite, and achavalite are described. At
Sierra de ...
4
Articles on Selenides, Including:
Umangite, Crookesite, ...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.
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Chemical Solution Deposition Of Semiconductor Films
The berzelianite phase with a small amount of umangite impurity was obtained.
The composition and phase of the film could be altered by electrochemical
cathodic polarization (in an aqueous K2SO4 solution). Initially, there occurred an
...
Metallic minerals identified in these deposits are : umangite, klockmannite,
hematite, a Cu-Ni-Co selenide, pitchblende, and traces of berzelianite,
clausthalite, and pyrite. Non-opaque minerals are : chalcomenite, and traces of
quartz, calcite, ...
Mineral formation sequence. The selenides form xenomorphic-granular
segregations which occupy the space between the idiomorphic calcite grains. In
some cases umangite segregations with irregular corrosion outlines occupy the
centers ...
8
Spirit Leveling in Utah, 1897-1938
HgCli Rickardite (Cu3Te2). — Crystal system unknown; color purplish red, similar
to bornite; hardness B. Strong anisotropism; gives four extinctions per revolution.
Interference color fiery orange, very similar to that of umangite. HNO3 blackens ...
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Care and Conservation of Geological Material
Umangite and klockmanuite Umangite (Cu58e2) rapidly tarnishes from dark red
with metallic lustre to dull violet-blue. It is likely that limited surface alteration to
blue chalcornenite (Cu4(SeO_,,)4. 8H20) occurs at high relative humidity.
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Microscopic Determination of the Ore Minerals
Crystal system unknown; color purplish red, similar to bornite; hardness B. Strong
anisotropism; gives four extinctions per revolution. Interference color fiery orange,
very similar to that of umangite. HNO3 blackens with effervescence.
Maxwell Naylor Short, 1940
