This mine worked two well defined veins up to 200 mm wide, containing bismuthinite and wolframite in a quartz matrix, with topaz and fluorite, in pegamtites near the top of a biotite granite host (Reid, 1919).
Bismuthinite reportedly occurred in long bladed crystals and delicate acicular forms.
Bismuthinite - Occurs as bright silvery crystal aggregates to 4 cm long and as micro needles in small cavities in fluorite, also as inclusions within quartz or fluorite.
The main component of the veins is quartz and sulphide minerals are concentrated as lumps among quartz crystals.
The ore minerals within the veins are cubanite, chalcopyrite, arsenopyrite, tetrahedrite-tennantite, bismuthinite, sphalerite and native Au.
High temperature ore minerals (cubanite, bismuthinite), wall rock alteration (secondary K-feldspar, pyrophylitic alteration), and spatial relations of veins with the pluton, all indicate a nearby source for the hydrothermal solutions which formed the quartz veins.
The associated minerals are: bismuthinite derivatives in the range bismuthinite—krupkaite, Ag-bearing lillianite, makovickyite, pavonite, cosalite, cannizzarite, tetradymite, native bismuth, chalcopyrite and pyrite.
Salzburgite and paarite are new superstructures of the bismuthinite—aikinite series with a periodicity of order equal to a four-fold, and five-fold multiple, respectively, of the bismuthinite substructure motif.
Leurs sont associés: dérivés de bismuthinite dans l’intervalle bismuthinite—krupkaïte, lillianite argentifère, makovickyite, pavonite, cosalite, cannizzarite, tétradymite, bismuth natif, chalcopyrite et pyrite.
Occurrence: Found in the ores bismite and bismuthinite.
It is mined as bismuth oxide (Bi, also known as bismite) or bismuthsulfide (Bi, bismuthinite), and the brittle, silvery elemental form is one of a few substances (water is another) for which the solid is less dense than the liquid.
Compounds of bismuth typically have low solubility in most solvents, so that definitive formula assignments are usually based on X-ray diffraction studies of crystalline samples that have been isolated in small or indefinite quantities.
Three independent events of sulfosalt replacement were recognized at Felbertal, respectively yielding krupkaite, gladite and Cu-bearing bismuthinite as replacement products of the older bismuthiniteaikinite derivatives.
Exsolution in the bismuthiniteaikinite series proceeds at each stage toward a pair of phases that are compositionally closest to the parent phase, building up to three-stage exsolution-induced sequences not described before.
Trois événements indépendants de remplacement des sulfosels ont eu lieu à Felbertal, menant à la formation de krupkaïte, gladite et bismuthinite cuprifère, respectivement, comme produits de remplacement des dérivés de la série bismuthiniteaikinite antérieurs.
Jun-Young Sung(Site not responding. Last check: 2007-10-03)
Geochemically important pathfinder elements are Bi, Cu, As, Sb and Sn in the Main area, Cu, As, Sb and Zn in the Northern Main area and Ag, Te and Zn in the McMahon Ridge area.
In the Main area, the most useful visual guide is the presence of bismuthinite.
Systematic differences in mineral compositions (e.g., goldfieldite, enargite) from Main to Northern Main to McMahon Ridge area suggest that these deposits are part of a large zoned hydrothermal system.
CHN1010) FLUORITE, minor BISMUTHINITE, Yaogangxian Mine, Yizhang Co., Hunan Province, China 4.5 x 6 x 2 cm, This is an aesthetic specimen that stands on its own.
CHN1011) FLUORITE, QUARTZ included with minor BISMUTHINITE, Yaogangxian Mine, Yizhang Co., Hunan Province, China 4 x 2.5 x 2 cm, This is an aesthetic specimen with the tip of the larger Quartz included with small Bismuthinite hairs.
The Quartz has a small nick on the back of the tip and contact on the back.
A white crystalline, brittle metal with a pinkish tinge.
The most important ores are bismuthinite or bismuth glance (Bi S (sub 3)) and bismite (Bi Also obtained as a byproduct in refining lead, copper, tin, silver, and gold ores.
Forms low-melting alloys that are used in fire detection and extinguishing systems; used as a catalyst for making acrylic fibers and as a carrier for fuel in atomic reactors; extensively used in cosmetics and in medicine.
www.webref.org /geology/b/bismuth.htm (182 words)
Minerals. Type localities of Utah(Site not responding. Last check: 2007-10-03)
Only a small amount of samples were collected and they were given to the Harvard Museum for preservation were they now remain.
Associated Minerals: Billingsleyite was found in a high-grade silver deposit associated with argentite, bismuthinite, galena, and pyrite, tennentite.
Description: Bixbyite is found as shiny fl cubic crystals.