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Purpurite Mineral Data |
General Purpurite Information |
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Mn+++PO4 | ||
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Molecular Weight = 149.91 gm | ||
Manganese 36.65 % Mn 52.66 % Mn2O3 | |||
Phosphorus 20.66 % P 47.34 % P2O5 | |||
Oxygen 42.69 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Mn3+(PO4) | ||
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Forms a series with the Fe+++ end-member heterosite. | ||
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Valid Species (Pre-IMA) 1905 | ||
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Faires tin mine, Kings Mt, Gaston Co., North Carolina, USA Link to MinDat.org Location Data. | ||
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From the Latin purpureus - "purple red." | ||
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Purpurite + Pronunciation ![]() |
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ICSD 38210 | ||
PDF 37-478 | |||
Purpurite Image | |||
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Purpurite Crystallography |
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a:b:c =0.601:1:0.4917 | ||
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a = 5.83, b = 9.7, c = 4.77, Z = 4; V = 269.75 Den(Calc)= 3.69 | ||
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Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb | ||
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By Intensity(I/Io): 2.448(1), 2.952(1), 4.37(0.7), | ||
Physical Properties of Purpurite |
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{100} Perfect, {001} Perfect | ||
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Brownish black, Violet, Dark pink, Dark red, Reddish purple. | ||
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3.4 | ||
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Subtranslucent to Opaque | ||
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Brittle - Uneven - Very brittle fracture producing uneven fragments. | ||
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Massive - Granular - Common texture observed in granite and other igneous rock. | ||
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4-5 - Fluorite-Apatite | ||
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Non-fluorescent. | ||
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Earthy (Dull) | ||
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Nonmagnetic | ||
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red | ||
Optical Properties of Purpurite |
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CI meas= -0.073 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2423,KPDmeas= 0.2629,KC= 0.2451 Ncalc = 1.83 - 1.9 |
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Biaxial (+), a=1.85, b=1.912, g=1.92, bire=0.0700, 2V(Calc)=38, 2V(Meas)=38. Dispersion relatively strong. | ||
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gray. | ||
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deep blood red. | ||
Calculated Properties of Purpurite |
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Bulk Density (Electron Density)=3.54 gm/cc note: Specific Gravity of Purpurite =3.69 gm/cc. |
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Fermion Index = 0.0002049161 Boson Index = 0.9997950839 |
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PEPurpurite = 10.45 barns/electron U=PEPurpurite x rElectron Density= 37.03 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Purpurite is Not Radioactive |
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Purpurite Classification |
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38.04.01.02 (38)Anhydrous Phosphates, etc | ||
(38.04)A+ XO4 | |||
(38.04.01)Dana Group | |||
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08.AB.10 08 - PHOSPHATES, ARSENATES, VANADATES | ||
08.A - Phosphates, etc. without additional anions, without H2O | |||
08.AB -With medium-sized cations | |||
Other Purpurite Information |
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Links to other databases for Purpurite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - EUROmin Project 5 - Ecole des Mines de Paris 6 - GeoScienceWorld 7 - Glendale Community College 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineralienatlas (Deutsch) 14 - Online Mineral Museum 15 - QUT Mineral Atlas 16 - Ruff.Info 17 - Scandinavian mineral gallery 18 - WWW-MINCRYST 19 - theimage Search for Purpurite using: Visit our Advertisers for Purpurite : Ask about Purpurite here : Print or Cut-and-Paste your Purpurite Specimen Label here :
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