Tombarthite-(Y) Y4(Si H4O12 x(OH)4+2x

Tombarthite-(Y) Y4(Si;H4)4O12¡x(OH)4+2x °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic, partially metamict. Point Group: 2=m: Massive, to about 1 cm. Physical Properties: Fracture: Conchoidal. Hardness = 5{6 D(meas.) = 3.51{3.65 D(calc.) = 3.64{3.68 Optical Properties: Translucent to opaque. Color: Brownish black ...

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Tombarthite-(Y) Mineral Data

PE Tombarthite-(Y) = 146.79 barns/electron U=PE Tombarthite-(Y) x r electron = 496.09 barns/cc. Radioactivity: GRapi = 19,942.06 (Gamma Ray American Petroleum Institute Units) Concentration of Tombarthite-(Y) per GRapi unit = 50.15 (PPM) Tombarthite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. ...

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Geological characteristics and analysis of known and …

With constant improvement in the industrial sector, graphite has become an important commodity in China's economy. China is now the main global graphite producer, with its share reaching close to 66% of the market followed by Brazil, Canada, India, North Korea and European countries (Murdie et al., 1985, Beyssac and Rumble, 2014).The United States …

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