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The Red Lead Mine has produced many fine specimens of crocoite over the years, and operations continue with the hope of discovering more exceptional specimens. The mine's crocoite specimens are highly sought after by collectors and have even been displayed at the Smithsonian Museum of Natural History in Washington D.C. [17] Dundas Extended Mine ...
Chromite contains Mg, ferrous iron [Fe(II)], Al and trace amounts of Ti. [5] Chromite can change into different minerals based on the amounts of each element in the mineral. Chromite is a part of the spinel group, which means that it is able to form a complete solid solution series with other members in the
Kosmochlor is a rare chromium sodium clinopyroxene with the chemical formula NaCr 3+ Si 2 O 6.. The name is from German kosmisch, for its occurrence in meteorites, and the Greek chlor, for green. [4]
Chromitite with bronzite phenocrysts from Stillwater Igneous Complex. Chromitite is an igneous cumulate rock composed mostly of the mineral chromite.It is found in layered intrusions such as the Bushveld Igneous Complex in South Africa, the Stillwater igneous complex in Montana and the Ring of Fire discovery in Ontario.
In chemistry the term chromite has been used in two contexts. Under IUPAC naming conventions, chromate(III) is preferred to chromite. [citation needed] For compounds containing an oxyanion of chromium in oxidation state of +3; For other compounds of chromium(III) as a means of distinguishing a chemical species such as hexacyanochromite(III).
The Parthenon, in Athens, a temple to Athena. Classical Greece was a period of around 200 years (the 5th and 4th centuries BC) in ancient Greece, [1] marked by much of the eastern Aegean and northern regions of Greek culture (such as Ionia and Macedonia) gaining increased autonomy from the Persian Empire; the peak flourishing of democratic Athens; the First and Second Peloponnesian Wars; the ...
The most common mineral inclusion in peridot is the chromium-rich mineral chromite. Magnesium-rich minerals also can exist in the form of pyrope and magnesiochromite. These two types of mineral inclusions are typically surrounded "lily-pad" cleavages. Biotite flakes appear flat, brown, translucent, and tabular. [16]
Stichtite is a mineral, a carbonate of chromium and magnesium; formula Mg 6 Cr 2 C O 3 (OH) 16 ·4H 2 O.Its colour ranges from pink through lilac to a rich purple colour. It is formed as an alteration product of chromite-containing serpentine.