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Johnbaumite Mineral Data

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General Johnbaumite Information

Help on Chemical  Formula: Chemical Formula: Ca5(AsO4)3(OH)
Help on Composition: Composition: Molecular Weight = 634.15 gm
   Calcium   31.60 %  Ca   44.21 % CaO
   Arsenic   35.44 %  As   54.37 % As2O5
   Hydrogen   0.16 %  H     1.42 % H2O
   Oxygen    32.80 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca5(AsO4)3(OH)
Help on Environment: Environment: As analog of hydroxylapatite and (OH) analog of svabite.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Palmer Shaft, Franklin mine, Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John L. Baum (1916-), resident geologist of the New Jersey Zinc Co. and curator of the Franklin Mineral Museum, Franklin, New Jersey, USA.
Help on Name Pronunciation: Name Pronunciation: Johnbaumite + Pronunciation Say JOHNBAUMITE
 

Johnbaumite Image

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  Johnbaumite   Tephroite

Comments: Violet crystalline massive johnbaumite with brown tephroite.
Location: Jacobsberg, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Johnbaumite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.71443
Help on Cell Dimensions: Cell Dimensions: a = 9.7, c = 6.93, Z = 2; V = 564.69 Den(Calc)= 3.73
Help on Crystal System: Crystal System: Hexagonal Space Group: P 63/m,P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.895(1), 2.798(0.7), 2.82(0.7),
 

Physical Properties of Johnbaumite

Help on Cleavage: Cleavage: {1010} Distinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.65
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luminescence: Luminescence: Fluorescent, Short UV=pink orange.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Johnbaumite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1838,KPDmeas= 0.1878,KC= 0.1858
Ncalc = 1.68 - 1.69
Help on Optical Data: Optical Data: Uniaxial (-), e=1.684, w=1.687, bire=0.0030.
 

Calculated Properties of Johnbaumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Johnbaumite =3.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005842641
Boson Index = 0.9994157359
Help on Photoelectric: Photoelectric: PEJohnbaumite = 27.96 barns/electron
U=PEJohnbaumite x rElectron Density= 100.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Johnbaumite is Not Radioactive
 

Johnbaumite Classification

Help on  Dana Class: Dana Class: 41.08.03.03 (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 Johnbaumite Information

Help on References: References: NAME( Dana8) 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 Johnbaumite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Print or Cut-and-Paste your Johnbaumite Specimen Label here :

Johnbaumite

Ca5(AsO4)3(OH)
Dana No: 41.08.03.03 Strunz No: 08.BN.05
Locality:

 

Notes:

 

 
   
 


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