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Stewartite Mineral Data |
General Stewartite Information |
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Mn++Fe+++2(PO4)2(OH)2•8(H2O) | ||
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Molecular Weight = 534.71 gm | ||
Manganese 10.27 % Mn 13.27 % MnO | |||
Iron 20.89 % Fe 29.87 % Fe2O3 | |||
Phosphorus 11.59 % P 26.55 % P2O5 | |||
Hydrogen 3.39 % H 30.32 % H2O | |||
Oxygen 53.86 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Mn2+Fe3+2(PO4)2(OH)2•8(H2O) | ||
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Granitic lithia-bearing pegmatites. | ||
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Valid Species (Pre-IMA) 1912 | ||
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Stuart mine, Queen Mountains, Pala, San Diego Co., California. Link to MinDat.org Location Data. | ||
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Named after it's locality. | ||
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Stewartite + Pronunciation ![]() |
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ICSD 6204 | ||
PDF 5-110 | |||
Stewartite Image | |||
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Stewartite Crystallography |
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a:b:c =0.9743:1:0.6768 | ||
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a = 10.398, b = 10.672, c = 7.223, Z = 2; alpha = 90.1°, beta = 109.1°, gamma = 71.83° V = 719.63 Den(Calc)= 2.47 | ||
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Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 | ||
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By Intensity(I/Io): 9.98(1), 2.99(0.4), 3.93(0.4), | ||
Physical Properties of Stewartite |
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{???} Good | ||
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Brownish yellow, Yellow, Orange. | ||
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2.94 | ||
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Transparent to translucent | ||
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Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye. | ||
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Fibrous - Crystals made up of fibers. | ||
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3 - Calcite | ||
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Non-fluorescent. | ||
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white | ||
Optical Properties of Stewartite |
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CI meas= 0.188 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2617,KPDmeas= 0.2207,KC= 0.2719 Ncalc = 1.67 - 1.8 |
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Biaxial (-), a=1.612-1.63, b=1.653-1.658, g=1.66-1.681, bire=0.0480-0.0510 | ||
Calculated Properties of Stewartite |
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Bulk Density (Electron Density)=2.50 gm/cc note: Specific Gravity of Stewartite =2.48 gm/cc. |
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Fermion Index = 0.0046920033 Boson Index = 0.9953079967 |
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PEStewartite = 9.22 barns/electron U=PEStewartite x rElectron Density= 23.01 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Stewartite is Not Radioactive |
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Stewartite Classification |
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42.11.10.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | ||
(42.11)where (AB)4 (XO4)3 Zq � x(H2O) | |||
(42.11.10)Laueite Group | |||
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08.DC.30 08 - PHOSPHATES, ARSENATES, VANADATES | ||
08.D - Phosphates, etc | |||
08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1 | |||
Other Stewartite Information |
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NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
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Links to other databases for Stewartite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Stewartite using: Visit our Advertisers for Stewartite : Ask about Stewartite here : Print or Cut-and-Paste your Stewartite Specimen Label here :
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