Isokite Mineral Data

Isokite Mineral Data
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General Isokite Information

Help on Chemical Formula: Chemical Formula: CaMg(PO4)F
Help on Composition: Composition: Molecular Weight = 178.35 gm
   Calcium     22.47 %  Ca   31.44 % CaO
   Magnesium   13.63 %  Mg   22.60 % MgO
   Phosphorus  17.37 %  P    39.79 % P2O5
   Oxygen      35.88 %  O
   Fluorine    10.65 %  F    10.65 % F
                 -   %   F    -4.49 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMg(PO4)F
Help on Environment: Environment: Secondary mineral sometimes found replacing wagnerite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Nkumbwa Hill, near Isoka, northern Kumbwa, Zamibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Name Pronunciation: Name Pronunciation: Isokite Say ISOKITE
 

Isokite Image

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Isokite

Comments: Pale brownish to brown isokite in quartz.
Location: Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Isokite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7457:1:0.7908
Help on Cell Dimensions: Cell Dimensions: a = 6.5109, b = 8.7301, c = 6.9046, Z = 4; beta = 112.246° V = 363.25 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.63(1), 3.02(1), 3.19(1),
Click Here for Large Isokite Structure Window Crystal Structure:

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Yang H , Zwick J , Downs R T , Costin G , Acta Crystallographica, Section C , 63 (2007) p.i89-i90, Isokite, CaMg(PO4)F0.8(OH)0.2, isomorphous with titanite, Locality: Kjorrestad, near Bamle, Norway

 

Physical Properties of Isokite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Colorless, Gray pink, Pink.
Help on Density: Density: 3.27
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Fluorescent, Long UV=blue.
Help on Luster: Luster: Silky - Pearly
Help on Streak: Streak: white
 

Optical Properties of Isokite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1838,KPDmeas= 0.1833,KC= 0.1891
Ncalc = 1.62
Help on Optical Data: Optical Data: Biaxial (+), a=1.59, b=1.594, g=1.614, bire=0.0240
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Isokite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Isokite =3.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEIsokite = 3.97 barns/electron
U=PEIsokite x rElectron Density= 12.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Isokite is Not Radioactive
 

Isokite Classification
Help on Dana Class: Dana Class: 41.05.06.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.06)Tilasite Group
 
41.05.06.01 Tilasite CaMg(AsO4)F C 2/c 2/m
 
41.05.06.02 Isokite CaMg(PO4)F C 2/c 2/m
 
41.05.06.03 Panasqueiraite CaMg(PO4)(OH,F) C 2/c 2/m
Help on Strunz Class: Strunz Class: 08.BH.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
 
08.BH.10 Durangite NaAl(AsO4)F C 2/c 2/m
 
08.BH.10 Isokite CaMg(PO4)F C 2/c 2/m
 
08.BH.10 Lacroixite NaAl(PO4)F C 2/c 2/m
 
08.BH.10 Maxwellite NaFe(AsO4)F Aa,A2/a Mono
 
08.BH.10 Panasqueiraite CaMg(PO4)(OH,F) C 2/c 2/m
 
08.BH.10 Tilasite CaMg(AsO4)F C 2/c 2/m
 

Other Isokite 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 Isokite :
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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Isokite

CaMg(PO4)F
Dana No: 41.05.06.02 Strunz No: 08.BH.10
Locality:

 

Notes: