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Pyrocoproite Mineral Data |
General Pyrocoproite Information |
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(Mg(K,Na))2P2O7 | ||
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Molecular Weight = 292.70 gm | ||
Potassium 20.04 % K 24.14 % K2O | |||
Sodium 3.93 % Na 5.29 % Na2O | |||
Magnesium 16.61 % Mg 27.54 % MgO | |||
Phosphorus 21.16 % P 48.50 % P2O5 | |||
Oxygen 38.26 % O | |||
______ ______ | |||
100.00 % 105.47 % = TOTAL OXIDE | |||
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Mg2K1.5Na0.5(P2O7) | ||
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Combustion of organic-rich quano which accumulates on the floor of caves inhabited by insect-eating bats. Considered a pre-cursor material for arnhemite. | ||
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Not Approved IMA | ||
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Arnhem Cave, Namibia. Link to MinDat.org Location Data. | ||
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Named after it's derivation from bat guano combustion. | ||
Pyrocoproite Image | |||
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Pyrocoproite Crystallography |
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a:b:c =1.7348:1:2.3119 | ||
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a = 9.41, b = 5.424, c = 12.54, Z = 4; beta = 104.35° V = 620.07 Den(Calc)= 3.14 | ||
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Monoclinic Space Group: Unk | ||
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By Intensity(I/Io): 2.714(1), 2.882(0.94), 4.55(0.63), | ||
Physical Properties of Pyrocoproite |
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None | ||
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Colorless. | ||
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2.96 - 2.98, Average = 2.97 | ||
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Encrustations - Forms crust-like aggregates on matrix. | ||
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white | ||
Optical Properties of Pyrocoproite |
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CI meas= 0.065 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.115 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.178,KPDmeas= 0.1882,KC= 0.2012 Ncalc = 1.6 - 1.63 |
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Biaxial (?), a=1.558, g=1.56, bire=0.0020 | ||
Calculated Properties of Pyrocoproite |
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Bulk Density (Electron Density)=2.92 gm/cc note: Specific Gravity of Pyrocoproite =2.97 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PEPyrocoproite = 3.43 barns/electron U=PEPyrocoproite x relectron= 10.01 barns/cc. |
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GRapi = 284.46 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Pyrocoproite |
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Pyrocoproite Classification |
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37.00.00.00 (37)Phosphate Minerals | ||
(37.00)Without Dana Classification Numbers | |||
(37.00.00)Phosphate, Thermocaca Series | |||
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08.FA.20 08 - PHOSPHATES, ARSENATES, VANADATES | ||
08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates | |||
08.FA -Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra. | |||
Other Pyrocoproite Information |
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NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.84,p197,1999) OPTIC PROP.(Am.Min.,Vol.84,p197,1999) | ||
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Links to other databases for Pyrocoproite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Pyrocoproite using: Visit our Advertisers for Pyrocoproite : Ask about Pyrocoproite here : Print or Cut-and-Paste your Pyrocoproite Specimen Label here :
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