Mineralogy Database

Prismatine Mineral Data

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General Prismatine Information

Help on Chemical  Formula: Chemical Formula: ([ ],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22
Help on Composition: Composition: Molecular Weight = 755.83 gm
   Magnesium   9.97 %  Mg   16.53 % MgO
   Aluminum   21.78 %  Al   41.14 % Al2O3
   Iron        5.91 %  Fe    2.85 % FeO /  5.28 % Fe2O3
   Silicon    14.12 %  Si   30.21 % SiO2
   Boron       0.86 %  B     2.76 % B2O3
   Hydrogen    0.40 %  H     3.58 % H2O
   Oxygen     44.45 %  O
   Fluorine    2.51 %  F     2.51 % F
                -   %   F    -1.06 % -O=F2    
             ______        ______ 
             100.00 %      103.81 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+0.3Mg0.1Mg3Al1.5Fe3+0.5Al4.6Si3.8B0.6O18(OH)3F
Help on Environment: Environment: Metamorphism of boron rich clay sediments to granulite facies.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Waldheim, Sachsen (Saxony), Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the prismatic form of typical crystals.
Help on Name Pronunciation: Name Pronunciation: Prismatine + Pronunciation Say PRISMATINE

Prismatine Image

Click Here for Larger   Image in a New Browser Window Images:
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Comments: Prismatic crystals of prismatine in matrix.
Location: Waldheim, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Prismatine Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1656:1:0.4895
Help on Cell Dimensions: Cell Dimensions: a = 15.938, b = 13.673, c = 6.693, Z = 4; V = 1,458.54 Den(Calc)= 3.44
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mcm

Physical Properties of Prismatine

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Yellow brown, Green brown, Brown green.
Help on Density: Density: 3.341 - 3.345, Average = 3.34
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 6.5-7 - Pyrite-Quartz
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Prismatine

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.054 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2043,KPDmeas= 0.2102,KC= 0.2223
Ncalc = 1.74 - 1.76
Help on Optical Data: Optical Data: Biaxial (-), a=1.669-1.671, b=1.681-1.83, g=1.682-1.684, bire=0.0130

Calculated Properties of Prismatine

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.30 gm/cc
note: Specific Gravity of Prismatine =3.34 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPrismatine = 3.16 barns/electron
U=PEPrismatine x rElectron Density= 10.43 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Prismatine is Not Radioactive

Prismatine Classification

Help on  Dana Class: Dana Class: (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.01)with cations in [4] and higher coordination; single and double groups (n=1,2)
  (58.01.01)Kornerupine Group Kornerupine (Mg,Fe)4Al6(SiO4,BO4)5(O,OH)2 C mcm 2/m 2/m 2/m Prismatine! ([],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 C mcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BJ.50 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BJ -Sorosilicates with Si3O10, Si4O11, etc
09.BJ.50 Kornerupine (Mg,Fe)4Al6(SiO4,BO4)5(O,OH)2 C mcm 2/m 2/m 2/m
09.BJ.50 Prismatine! ([],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 C mcm 2/m 2/m 2/m

Other Prismatine Information

Help on References: References: NAME( Min.Mag.,Vol.60,No3,p483-491,1996) PHYS. PROP.(Min.Mag.,Vol.60,No3,p483-491,1996) OPTIC PROP.(Min.Mag.,Vol.60,No3,p483-491,1996)
Help on See Also: See Also: Links to other databases for Prismatine :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Scandinavian mineral gallery

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


([ ],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22
Dana No: Strunz No: 09.BJ.50





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