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Purpurite Mineral Data + |
General Purpurite Information |
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| Mn+++PO4 | |||
| Molecular Weight = 149.91 gm | |||
| Manganese 36.65 % Mn 52.66 % Mn2O3 | |||
| Phosphorus 20.66 % P 47.34 % P2O5 | |||
| Oxygen 42.69 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mn3+(PO4) | |||
| Forms a series with the Fe+++ end-member heterosite. | |||
| Valid Species (Pre-IMA) 1905 | |||
| Faires tin mine, Kings Mt, Gaston Co., North Carolina, USA Link to MinDat.org Location Data. | |||
| From the Latin purpureus - "purple red." | |||
| 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 | |||
| a = 5.83, b = 9.7, c = 4.77, Z = 4; V = 269.75 Den(Calc)= 3.69 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmnb | |||
| 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 | |||
| Brownish black, Violet, Dark pink, Dark red, Reddish purple. | |||
| 3.4 | |||
| Subtranslucent to Opaque | |||
| Brittle - Uneven - Very brittle fracture producing uneven fragments. | |||
| Massive - Granular - Common texture observed in granite and other igneous rock. | |||
| 4-5 - Fluorite-Apatite | |||
| Non-fluorescent. | |||
| Earthy (Dull) | |||
| Nonmagnetic | |||
| 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 |
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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. | |||
| gray. | |||
| deep blood red. | |||
| deep blood red. | |||
Calculated Properties of Purpurite |
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relectron=3.54 gm/cc |
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| Fermion Index = 0.0002 Boson Index = 0.9998 |
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PEPurpurite = 10.45 barns/electron |
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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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| 38.4.1.2 (38)Anhydrous Phosphates, etc | |||
| (38.4)A+ XO4 | |||
| (38.4.1)Dana Group | |||
| VII/A.02-60 VII - Phosphates, Arsenates and Vanadates | |||
| VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions. cations of medium size: Mostly Fe, Mn | |||
| VII/A.02 - Simferrite - Natrophilite series | |||
Other Purpurite Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) | |||
| Links to other databases for Purpurite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Glendale Community College 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 - Scandinavian mineral gallery 17 - WWW-MINCRYST 18 -theimage 19 -École des Mines de Paris Search for Purpurite using: Visit our Advertisers for Purpurite : Translate Purpurite Mineral Data : Ask about Purpurite here : Print or Cut-and-Paste your Purpurite Specimen Label here :
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