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Archive for March, 2011

Bruggenite

Tuesday, March 29th, 2011

The chemical formula of mineral Bruggenite is indicated by Ca(IO3)2•(H2O). Mineral Bruggenite is usually found in veins with nitratine and impregnating the enclosing decomposing rhyolite tuff in a small basin filled with nitrate caliche. This mineral is commonly found at its type of locality at Pampa Pique III, about one km north of Oficina Lautaro, […]

Brownmillerite

Tuesday, March 29th, 2011

The chemical formula of mineral Brownmillerite is indicated by Ca2(Al,Fe+++)2O5. Brownmillerite is usually found in a thermally metamorphosed limestone blocks included in volcanic rocks. Brownmillerite is commonly found at its type of locality at Ettringer-Bellerberg volcano, near Mayen, Eifel district, Germay. Mineral Brownmillerite was named for Lorrin Thomas Brownmiller (1902-), Chef chemist of the Alpha […]

Bromargyrite

Tuesday, March 29th, 2011

The chemical formula of mineral Bromargyrite is indicated by AgBr. This mineral is most commonly found in oxidized portions of silver deposits. This mineral Bromargyrite is usually found occuring at its type of locality at Mexico, Chile. This mineral was named after its composition of bromine, from the Greek word, bromos which means “stench” and […]

Brinrobertsite

Tuesday, March 29th, 2011

The chemical composition of mineral Brinrobertsite is indicated by the formula (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O) [x = 0.35, n = 3.54]. Brinrobertsite is commonly found in an Ordovician soapy mudtone (metabentonite). This mineral was altered from ash (glass) with pyrophyllite as the precursor mineral. Brinrobertsite is commonly found at its type of locality at Bangor, North Wales, England, […]

Brewsterite – Ba

Tuesday, March 29th, 2011

The chemical composition of mineral Brewsterite – Ba is indicated by the formula (Ba,Sr)Al2Si6O16•5(H2O). This mineral Brewsterite – Ba is considered as a secondary mineral in metamorphosed calc-silicates. It is known to be Ba-dominant member of the brewsterite series. Brewsterite – Ba was discovered at the No. 4 wollastonite mine of the Gouverneur Talc Co., […]

Brownleeite

Tuesday, March 29th, 2011

The chemical formula of mineral Brownleeite is indicated by MnSi. This mineral is a known member of Fersilicite group. Mineral Brownleeite is also known as an interplanetary dust particle collected from the stratosphere over south-western USA, probably from Comet 26P/Grigg-Skjellerup. Brownleeite was named after Donald E. Brownlee, professor of astronomy at the University of Washington, […]

Brinrobertsite

Tuesday, March 29th, 2011

The chemical composition of mineral Brinrobertsite is indicated by the formula (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O) [x = 0.35, n = 3.54]. Brinrobertsite is commonly found in an Ordovician soapy mudtone (metabentonite). This mineral was altered from ash (glass) with pyrophyllite as the precursor mineral. Brinrobertsite is commonly found at its type of locality at Bangor, North Wales, England, […]

Brockite

Tuesday, March 29th, 2011

The chemical formula of mineral Brockite is inidcated by (Ca,Th,Ce)(PO4)•(H2O). mineral Brockite is cconsidered as a rare accessory mineral in granite and granite pegmatites. It is commonly found at its type of locality in the USA, in a prospect pit about one km east of the Bassick mine, Querida, Wet Mountains, and at the Hardwick […]

Brizziite-III

Tuesday, March 29th, 2011

The chemical formula of mineral Brizziite-III is indicated by NaSbO3. Mineral Brizziite-III is known as the result of deep weathering of stibnite. It can be found at its type of locality at the Cetine mine, approximately 20 km SW of Sienna, Tuscany, Italy. This mineral was named for Dr. Giancarlo Brizzi (1936-1992) who discovered the […]

Brucite

Tuesday, March 29th, 2011

The chemical formula of mineral Brucite is indicated by Mg(OH)2. Brucite commonly occurs in serpentine, in chlorite or dolomitic schists, or in crystalline limestones as an alteration product of periclase. This mineral is most commonly found at its type of locality at New Jersey, USA serpentine. Brucite can be also found at Asbestos mines of […]

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