10 LIVRES EN ANGLAIS EN RAPPORT AVEC «TUNGSTITE»
Découvrez l'usage de
tungstite dans la sélection bibliographique suivante. Des livres en rapport avec
tungstite et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Tungsten Minerals and Deposits
XVII, B.) TUNGSTITE. Tungstite (hydrous tungsten oxide, W03.H20). or tungsten
ocher, was originally described as free from water, and was later named
meymacite by Carnot,1 a French chemist, who thought he had discovered a new
mineral ...
2
Tungsten Mineralization in the United States
ing. The occurrence in a fine yellow powder has been described by Walker (1908
) from Salmo, B. C. The hardness is 2.5, and the specific gravity 5.517. Chemical
analyses of tungstite (1) (2) (3) (4) W0; . . . . . . . . . . . . . . . . . . .. 91.30 86.20 91.03 ...
No evidence of any solution and redeposition of tungsten has been seen in the
contact deposits, and the scheelite is generally not altered even at the surface,
though tungstite stains the scheelite in a few places. However, at the outcrops of
a ...
4
Tungsten: Properties, Chemistry, Technology of the Elements, ...
In the group of the minor minerals, two exceptions exist: (1) tungstenite — which
is a sulfide, and (2) tungstite — which is an oxide hydrate. The Wolframite Group.
The wolframite group comprises iron and manganese tungstate minerals of ...
Erik Lassner, Wolf-Dieter Schubert, 1999
5
Geological Survey Professional Paper
... the oxidation of pyrite, and it occurs commonly as pseudomorphs after pyrite (
figs. 4, 8, 9, 10, 11, and 19), fracture fillings (figs. 4 and 33), and as a wash or in
dustlike form permeating vein material and wall rocks. Tungstite, a hydrous oxide
...
Geological Survey (U.S.), 1984
6
Second Report on a Cooperative Investigation of the ...
Tungstite was seen only at the Roderick shaft in the Beaver Creek district. There,
vugs in shiny black uncorroded ferberite are filled with soft bright-yellow tungstite;
the larger rugs contain as much as 1 pound of the mineral. The relations are ...
7
The Enrichment of Ore Deposits
Tungstite, W03, or probably H2W04, is a common decomposition product of
tungsten minerals. Under some conditions it forms pseudomorphs after
tungstates. This phase of decomposition is not universal, however, and probably
takes place ...
William Harvey Emmons, 1917
8
Encyclopedia of the Alkaline Earth Compounds
The compound, strontium tungstite, SrWO3, has the same structure as the
corresponding molybdite as shown in Fig. 10.85. It is not certain whether these “
tungstite or molyb- dite” compounds follow the trend of the cubic-stacked “
perovskite ...
9
Current Research - Geological Survey of Canada: Recherches ...
THE X-RAY CRYSTALLOGRAPHY OF TUNGSTITE Project 680023 A.C. Roberts
Central Laboratories and Technical Services Division Introduction Tungstite,
ideally WO3~H;O, is a rare secondary tungsten oxide mineral found in Canada at
...
Commission géologique du Canada
10
The Mineralogical Record
TUNGSTITE The mineral name tungstite has been widely used in the literature to
denote yellow, powdery tungstic ocher not subjected to valid mineral
characterization. It seems likely that some specimens labeled tungstite in the
collections are ...
ACTUALITÉS CONTENANT LE TERME «TUNGSTITE»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
tungstite est employé dans le contexte des actualités suivantes.
Mine Tales: Tungsten, once mined here, now an import
Tungsten minerals include wolframite, scheelite, powellite, cuprotungstite and tungstite. Wolframite and scheelite — the two main commercial ores — are often ... «Arizona Daily Star, août 14»
