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General Mapimite Information |
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 Chemical Formula: |
Zn2Fe+++3(AsO4)3(OH)4•10(H2O) | ||
| Composition: |
Molecular Weight = 963.26 gm | ||
| Zinc 13.58 % Zn 16.90 % ZnO | |||
| Iron 17.39 % Fe 24.87 % Fe2O3 | |||
| Arsenic 23.33 % As 35.79 % As2O5 | |||
| Hydrogen 2.51 % H 22.44 % H2O | |||
| Oxygen 43.19 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Zn2Fe3+3(AsO4)3(OH)4•10(H2O) | ||
| Environment: |
Rare secondary mineral in the oxidized zone of an arsenic-rich hydrothermal polymetallic ore deposit. | ||
| IMA Status: |
Approved IMA 1981 | ||
| Locality: |
Ojuela mine, Mapimi, Durango, Mexico. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Mapimite  |
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| Synonym: |
ICSD 26554 | ||
| PDF 35-515 | |||
Search for Mapimite Images | |||
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Images:
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Mapimite Crystallography |
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| Axial Ratios: |
a:b:c =1.0114:1:0.7672 | ||
| Cell Dimensions: |
a = 11.425, b = 11.296, c = 8.667, Z = 2; beta = 107.733° V = 1,065.39 Den(Calc)= 3.00 | ||
| Crystal System: |
Monoclinic - DomaticH-M Symbol (m) Space Group: Cm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.24(1), 7.83(0.94), 4.662(0.61), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Mapimite |
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| Cleavage: |
{???} Good | ||
| Color: |
Blue, Green. | ||
| Density: |
2.95 | ||
| Hardness: |
3 - Calcite | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Mapimite |
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| Gladstone-Dale: |
CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.043 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2291,KPDmeas= 0.233,KC= 0.2393 Ncalc = 1.71 - 1.72 |
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| Optical Data: |
Biaxial (+), a=1.672, b=1.678, g=1.712, bire=0.0400, 2V(Calc)=48, 2V(Meas)=50. | ||
Calculated Properties of Mapimite |
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| Electron Density: |
Bulk Density (Electron Density)=2.87 gm/cc note: Specific Gravity of Mapimite =2.95 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0094648829 Boson Index = 0.9905351171 |
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| Photoelectric: |
PEMapimite = 27.46 barns/electron U=PEMapimite x rElectron Density= 78.88 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mapimite is Not Radioactive |
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Mapimite Classification |
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| Dana Class: |
42.08.07.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | ||
| (42.08)where (AB)7 (XO4)4 Zq · x(H2O) | |||
| (42.08.07)Dana Group | |||
| Strunz Class: |
08.DC.55 08 - PHOSPHATES, ARSENATES, VANADATES | ||
| 08.D - Phosphates, etc | |||
| 08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1 | |||
Other Mapimite Information |
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| References: |
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Mapimite : 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 15 - WWW-MINCRYST Search for Mapimite using: Visit our Advertisers for Mapimite : A Bijoux Google Search for MapimiteAdam's Minerals Google Search for Mapimite Cape Minerals Google Search for Mapimite Dakota Matrix Minerals Google Search for Mapimite Excalibur Mineral Corp. Google Search for Mapimite Exceptional Minerals Google Search for Mapimite John Betts Fine Minerals Search for Mapimite McDougall Minerals Google Search for Mapimite Mineral News Website Link Rock and Mineral Shows Google Search for Mapimite Weinrich Minerals, Inc. Google Search for Mapimite Ask about Mapimite here : Print or Cut-and-Paste your Mapimite Specimen Label here :
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