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Richellite Mineral Data
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General Richellite Information
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 Chemical Formula: |
Ca3Fe+++10(PO4)8(OH)12•n(H2O) |
| Composition: |
Molecular Weight = 1,660.58 gm |
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Calcium 7.24 % Ca 10.13 % CaO |
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Iron 33.63 % Fe 48.08 % Fe2O3 |
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Phosphorus 14.92 % P 34.19 % P2O5 |
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Hydrogen 0.85 % H 7.59 % H2O |
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Oxygen 43.36 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca3Fe3+10(PO4)8(OH)12•(H2O) |
| IMA Status: |
Valid Species (Pre-IMA) 1884 |
| Locality: |
Richelle, near Vise in Liege, Balgium. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Richellite + Pronunciation  |
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Richellite Image |
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Images:
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Richellite Crystallography
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| Axial Ratios: |
a:c = 1:2.43436 |
| Cell Dimensions: |
a = 5.18, c = 12.61, Z = 0.25; V = 338.36 Den(Calc)= 2.04 |
| Crystal System: |
Tetragonal - Pyramidal H-M Symbol (4) Space Group: P 4 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.24(1), 1.59(0.8), 3.58(0.65), |
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Physical Properties of Richellite
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| Color: |
Yellow brown, Reddish brown. |
| Density: |
2 |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
2-3 - Gypsum-Calcite |
| Luster: |
Greasy (Oily) |
| Streak: |
yellowish brown |
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Optical Properties of Richellite
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| Optical Data: |
NCalc= 1.53 - from Gladstone-Dale relationship (KC = 0.2611) where Ncalc=Dcalc*KC+1
NCalc= 1.52 - from Gladstone-Dale relationship (KC = 0.2611) where Ncalc=Dmeas*KC+1
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Calculated Properties of Richellite
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| Electron Density: |
Bulk Density (Electron Density)=2.00 gm/cc
note: Specific Gravity of Richellite =2.04 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0074369176
Boson Index = 0.9925630824 |
| Photoelectric: |
PERichellite = 11.63 barns/electron
U=PERichellite x rElectron Density= 23.26 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Richellite is Not Radioactive |
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Richellite Classification
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| Dana Class: |
42.13.02.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.13)Dana Type |
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(42.13.02)Dana Group |
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42.13.02.01 Richellite Ca3Fe10(PO4)8(OH)12•n(H2O) P 4 4 |
| Strunz Class: |
08.BB.90 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.B - Phosphates, etc. with Additional Anions, without H2O |
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08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1 |
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08.BB.90 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 41212 4 2 2 |
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08.BB.90 Richellite Ca3Fe10(PO4)8(OH)12•n(H2O) P 4 4 |
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08.BB.90 Zinclipscombite! ZnFe2(PO4)2(OH) P 43212 or P 41212 4 2 2 |
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Other Richellite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Richellite :
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
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Print or Cut-and-Paste your Richellite Specimen Label here :
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Richellite
Ca3Fe+++10(PO4)8(OH)12•n(H2O)
Dana No: 42.13.02.01 Strunz No: 08.BB.90
Locality:
Notes:
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