Richellite Mineral Data + 
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- 42.13.2.1 Richellite Ca3Fe10(PO4)8(OH)12·n(H2O) P 4 4
- VII/B.08-10 Trolleite Al4(PO4)3(OH)3 I2/c 2/m
- VII/B.08-20 Lazulite MgAl2(PO4)2(OH)2 P 21/c 2/m
- VII/B.08-30 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m
- VII/B.08-40 Barbosalite FeFe2(PO4)2(OH)2 P 21/c 2/m
- VII/B.08-50 Hentschelite CuFe2(PO4)2(OH)2 P 21/n 2/m
- VII/B.08-55 Wilhelmkleinite! ZnFe3(AsO4)2(OH)2 P 21/n 2/m
- VII/B.08-60 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 41212 4 2 2
- VII/B.08-70 Richellite Ca3Fe10(PO4)8(OH)12·n(H2O) P 4 4
General Richellite Information |
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 Chemical Formula: |
Ca3Fe+++10(PO4)8(OH)12·n(H2O) | ||
| Composition: |
Molecular Weight = 1,660.58 gm | ||
| Calcium 7.24 % Ca 10.13 % CaO | |||
| Iron 33.63 % Fe 48.08 % Fe2O3 | |||
| Phosphorus 14.92 % P 34.19 % P2O5 | |||
| Hydrogen 0.85 % H 7.59 % H2O | |||
| Oxygen 43.36 % O | |||
| ______ ______ | |||
| 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. | ||
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 - PyramidalH-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), | ||
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 | ||
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: |
relectron=2.00 gm/cc |
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| Fermion Index |
Fermion Index = 0.00743 Boson Index = 0.99257 |
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| Photoelectric: |
PERichellite = 11.63 barns/electron |
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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: |
42.13.2.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | ||
| (42.13)Dana Type | |||
| (42.13.2)Dana Group | |||
| Strunz Class: |
VII/B.08-70 VII - Phosphates, Arsenates and Vanadates | ||
| VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds | |||
| VII/B.08 - Lazulite group, Trolleite - Richellite | |||
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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Richellite using: Visit our Advertisers for Richellite : Translate Richellite Mineral Data : Ask about Richellite here : Print or Cut-and-Paste your Richellite Specimen Label here :
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