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Fermorite Mineral Data

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General Fermorite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Sr)5(AsO4,PO4)3(OH)
Help on Composition: Composition: Molecular Weight = 707.27 gm
   Strontium   24.78 %  Sr   29.30 % SrO
   Calcium     17.00 %  Ca   23.79 % CaO
   Arsenic     26.48 %  As   40.62 % As2O5
   Phosphorus   2.19 %  P     5.02 % P2O5
   Hydrogen     0.14 %  H     1.27 % H2O
   Oxygen      29.41 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Sr2(AsO4)2.5(PO4)0.5(OH)
Help on Environment: Environment: Rare mineral in veinlets through a manganese deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1911
Help on Locality: Locality: Sitapar, Chhindwara district, Madhya Pradesh, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Lewis Leigh Fermor (1880-1954), former Director of the Geological Survey of India.
Help on Name Pronunciation: Name Pronunciation: Fermorite + Pronunciation Say FERMORITE
Help on Synonym: Synonym: ICSD 71351
  PDF 14-215
 

Fermorite Image

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  Fermorite

Comments: Pinkish crystalline massive fermorite.
Location: Sitipar, Chindwara District, India. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fermorite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.73089
Help on Cell Dimensions: Cell Dimensions: a = 9.55, c = 6.98, Z = 2; V = 551.31 Den(Calc)= 4.26
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.86(1), 2.75(0.6), 3.49(0.5),
 

Physical Properties of Fermorite

Help on Cleavage: Cleavage: None
Help on Color: Color: White, Light pink.
Help on Density: Density: 3.518
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Fermorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.088 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.101 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1543,KPDmeas= 0.1869,KC= 0.1718
Ncalc = 1.6 - 1.73
Help on Optical Data: Optical Data: Uniaxial (-), e=1.655, w=1.66, bire=0.0050.
 

Calculated Properties of Fermorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.29 gm/cc
note: Specific Gravity of Fermorite =3.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEFermorite = 48.61 barns/electron
U=PEFermorite x rElectron Density= 160.06 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fermorite is Not Radioactive
 

Fermorite Classification

Help on  Dana Class: Dana Class: 41.08.03.04 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.08)where (A)5 (XO4)3 Zq
  (41.08.03)Svabite Group
 
41.08.03.01 Svabite Ca5(AsO4)3F P 63/m 6/m
 
41.08.03.02 Turneaureite Ca5[(As,P)O4]3Cl P 63/m 6/m
 
41.08.03.03 Johnbaumite Ca5(AsO4)3(OH) P 63/m,P 63 Hex
 
41.08.03.04 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 63/m 6/m
Help on  Strunz Class: Strunz Class: 08.BN.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1
 
08.BN.05 Alforsite Ba5(PO4)3Cl P 63/m 6/m
 
08.BN.05 Apatite* Ca5(PO4)3(OH,F,Cl) P 63/m 6/m
 
08.BN.05 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3
 
08.BN.05 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3
 
08.BN.05 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 63/m 6/m
 
08.BN.05 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3
 
08.BN.05 Johnbaumite Ca5(AsO4)3(OH) P 63/m,P 63 Hex
 
08.BN.05 Apatite-(CaOH) Ca5(PO4)3(OH) P 63/m 6/m
 
08.BN.05 Apatite-(CaCl) Ca5(PO4)3Cl P 63/m 6/m
 
08.BN.05 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 63/m 6/m
 
08.BN.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 63/m 6/m
 
08.BN.05 Clinomimetite Pb5(AsO4)3Cl P 21/b 2/m
 
08.BN.05 Apatite-(CaF) Ca5(PO4)3F P 63/m 6/m
 
08.BN.05 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 63 6
 
08.BN.05 Hedyphane Ca2Pb3(AsO4)3Cl P 63/m 6/m
 
08.BN.05 Mimetite Pb5(AsO4)3Cl P 63/m 6/m
 
08.BN.05 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 63/m 6/m
 
08.BN.05 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 63/m,P 63 Hex
 
08.BN.05 Pyromorphite Pb5(PO4)3Cl P 63/m 6/m
 
08.BN.05 Vanadinite Pb5(VO4)3Cl P 63/m 6/m
 
08.BN.05 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 21/b 2/m
 
08.BN.05 IMA2008-068! Ca2Pb3(PO4)3F P 63/m 6/m
 
08.BN.05 Svabite Ca5(AsO4)3F P 63/m 6/m
 
08.BN.05 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3
 
08.BN.05 Turneaureite Ca5[(As,P)O4]3Cl P 63/m 6/m
 
08.BN.05 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 63/m 6/m
 
08.BN.05 IMA2008-009! Sr5(PO4)3F P 63/m 6/m 2/m 2/m
 
08.BN.05 Hydroxylpyromorphite! Pb5(PO4)3OH P 63/m 6/m
 

Other Fermorite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Fermorite :
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

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Fermorite

(Ca,Sr)5(AsO4,PO4)3(OH)
Dana No: 41.08.03.04 Strunz No: 08.BN.05
Locality:

 

Notes:

 

 
   
 


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