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Richellite Mineral Data

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General Richellite Information

Help on Chemical  Formula: Chemical Formula: Ca3Fe+++10(PO4)8(OH)12•n(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ca3Fe3+10(PO4)8(OH)12•(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1884
Help on Locality: Locality: Richelle, near Vise in Liege, Balgium. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Richellite + Pronunciation Say RICHELLITE

Richellite Image

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Comments: Khaki-colored earthy richellite masses.
Location: Richelle, near Vise, Liege, Belgium. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Richellite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.43436
Help on Cell Dimensions: Cell Dimensions: a = 5.18, c = 12.61, Z = 0.25; V = 338.36 Den(Calc)= 2.04
Help on Crystal System: Crystal System: Tetragonal - Pyramidal H-M Symbol (4) Space Group: P 4
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.24(1), 1.59(0.8), 3.58(0.65),

Physical Properties of Richellite

Help on Color: Color: Yellow brown, Reddish brown.
Help on Density: Density: 2
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: yellowish brown

Optical Properties of Richellite

Help on Optical Data: 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

Calculated Properties of Richellite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.00 gm/cc
note: Specific Gravity of Richellite =2.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0074369176
Boson Index = 0.9925630824
Help on Photoelectric: Photoelectric: PERichellite = 11.63 barns/electron
U=PERichellite x rElectron Density= 23.26 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Richellite is Not Radioactive

Richellite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.13)Dana Type
  (42.13.02)Dana Group Richellite Ca3Fe10(PO4)8(OH)12•n(H2O) P 4 4
Help on  Strunz Class: Strunz Class: 08.BB.90 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.90 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 41212 4 2 2
08.BB.90 Richellite Ca3Fe10(PO4)8(OH)12•n(H2O) P 4 4
08.BB.90 Zinclipscombite! ZnFe2(PO4)2(OH) P 43212 or P 41212 4 2 2

Other Richellite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 08.BB.90





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