Leave a message

Archive for the 'Optical Mineralogy' Category

Delindeite

Monday, January 30th, 2012

The chemical composition of mineral Delindeite is indicated by the formula Ba2(Na,K,[ ])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2. Delindeite is considered as a secondary mineral formed under oxidizing conditions from a titianiferous nepheline syenite. Mineral Delindeite is known to commonly occur from its type of locality at Diamond Jo quarry, Magnet Cove, Hot Springs County, Arkansas, USA. Delindeite was named […]

Deliensite

Monday, January 30th, 2012

The chemical composition of mineral Deliensite is indicated by the formula Fe++(UO2)2(SO4)2(OH)2•3(H2O). It is usually found occurring at an oxidized zone of a uranium deposit. Deliensite is also found from its type of locality at Mas D’Alary, Lodeve, Herault, France. It was named for Dr. Michel Deliens (1939-), Royal Belgian Institute of Natural History, Brussels, […]

Delhayelite

Monday, January 30th, 2012

The chemical composition of mineral Delhayelite is indicated by the formula (Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3•18(H2O). Delhayelite is commonly found occurring in a kalsilite-bearing melitlite-nepheline lava. It can be also found from its type of locality at Mt. Sharheru, the extinct southern cone of Mt. Nyiragongo, Kivu Province, Zaire. Mineral Delhayelite was named for Fernard Delhaye (1880-1946), Belgian geologist, […]

Delafossite

Monday, January 30th, 2012

The chemical formula of mineral is indicated by CuFe3+O2. Delafossite is principally as a secondary mineral near the base of the oxidized zone of copper deposits, less commonly a primary mineral. Mineral Delafossite is commonly found at Calumet and Arizona mine, Bisbee, Cochise Co., Arizona, USA. This mineral was named for Gabrial Delafosse (1796-1878), French […]

Defernite

Monday, January 30th, 2012

The chemical composition of mineral Defernite is indicated by the formula Ca6(CO3)1.5(SiO4)0.5(OH)7.5Cl0.5. Mineral Defernite is commonly found occurring in skarn at a granite-limestone contact. It can be also found from its type of locality at Gauneyce-Ikizdere area, Trabzon Province, Turkey. Defernite was named for Jacques Deferne, Curator of Mineralogy, Museum of Natural History, Geneva, Switzerland. […]

Deerite

Monday, January 30th, 2012

The chemical composition of mineral Deerite is indicated by the formula Fe2+4Mn2+2Fe3+2.25Al0.75Si6O20(OH)5. Deerite is commonly found occurring in meta-ironstones and Cu-Fe sulfide deposits, in blueschist facies metasediments formed at high pressure and low temperature. Deerite is usually found from its type of locality at Laytonville quarry, 5 miles south of Laytonville, Mendocino Co. California. Named […]

Decrespignyite-(Y)

Monday, January 30th, 2012

The chemical composition of mineral Decrespignyite-(Y) is indicated by the formula (Y,REE)4Cu(CO3)4Cl(OH)5•2(H2O). This is considered as supergene product with other Y-bearing copper minerals. Decrespignyite-(Y) is most commonly found occurring from its type of locality at Paratoo copper mine, Yunta, Olary Province, South Australia, Australia. Mineral Decrespignyite-(Y) was named for Robert James Champion de Crespigny (1950-), […]

Deanesmithite

Monday, January 30th, 2012

The chemical formula of mineral Deanesmithite is indicated by Hg2Hg3CrO5S2. This mineral is very rare in a mercury deposit in silicate-carbonate rock hydrothermally altered from serpentine. Deanesmithite is usually found occurring at Clear Creek claim, near the Clear Creek mercury mine, New Idria district, San Benito County, California, USA. Deanesmithite was named for Deane K. […]

Dayingite

Monday, January 30th, 2012

The chemical formula of mineral Dayingite is indicated by CuCoPtS4. Dayingite is usually found occurring from the unspecified locality in China. Dayingite was named for the locality (dayingite = “Ta – ying”). Dayingite is known to crystallize in the isometric system of crystal formation. In optical mineralogy, this isometric crystal system comprises crystals having three […]

Dawsonite

Monday, January 30th, 2012

The chemical formula of mineral Dawsonite is indicated by NaAl(CO3)(OH)2. This mineral is most commonly found occurring at Feldspathic dike near McGill university, Montreal, Canada. This mineral was named after the Canadian geologist, J. W. Dawson (1820-1899). Dawsonite is known to crystallize in the orthorhombic system of crystal formation. In optical mineralogy, this orthorhombic crystal […]

Click Here For Best Selection Of High Quality Polarizing Microscope