Mineralogy Database

Jasmundite Mineral Data

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General Jasmundite Information

Help on Chemical  Formula: Chemical Formula: Ca11(SiO4)4O2S
Help on Composition: Composition: Molecular Weight = 873.26 gm
   Calcium  50.48 %  Ca   70.64 % CaO
   Silicon  12.86 %  Si   27.52 % SiO2
   Sulfur    3.67 %  S     3.67 % S2-
              -   %  S    -1.83 % -O=S 
   Oxygen   32.98 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca11(SiO4)4O2S
Help on Environment: Environment: In metamorphosed limestone inclusions in basalt.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Bellerberg volcano, two km north of Mayen, Eifel district, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Karl Jasmund, retired Director of the Mineralogical-Petrographic Institute, University of Cologne, Cologne, Germany.
Help on Name Pronunciation: Name Pronunciation: Jasmundite + Pronunciation Say JASMUNDITE
Help on Synonym: Synonym: ICSD 63412
  PDF 33-296

Jasmundite Image

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  Jasmundite   Cuspidine

Comments: Tan-brownish crystals of jasmundite and dark green cuspidine with gehlenite and spinel in matrix.
Location: Bellerberg, Eifel, Germany. Scale: Not Given.
© Diederik Visser

Jasmundite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.84246
Help on Cell Dimensions: Cell Dimensions: a = 10.461, c = 8.813, Z = 2; V = 964.43 Den(Calc)= 3.01
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.832(1), 3.242(0.42), 2.615(0.35),

Physical Properties of Jasmundite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish green, Greenish brown, Dark brown.
Help on Density: Density: 3.03
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Resinous
Help on Streak: Streak: white

Optical Properties of Jasmundite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.158 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.166 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2397,KPDmeas= 0.2381,KC= 0.2056
Ncalc = 1.62
Help on Optical Data: Optical Data: Uniaxial (+), w=1.715, e=1.728, bire=0.0130.

Calculated Properties of Jasmundite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Jasmundite =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0071230718
Boson Index = 0.9928769282
Help on Photoelectric: Photoelectric: PEJasmundite = 6.86 barns/electron
U=PEJasmundite x rElectron Density= 20.77 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jasmundite is Not Radioactive

Jasmundite Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.07)Afwillite and related species Afwillite Ca3Si2O4(OH)6 P 21 2 Bultfonteinite Ca2SiO2(OH,F)4 P1 1 Hatrurite Ca3SiO5 R 3m 3m Jasmundite Ca11(SiO4)4O2S I 42m 4 2m
Help on  Strunz Class: Strunz Class: 09.AG.70 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] � [6] coordination
09.AG.70 Jasmundite Ca11(SiO4)4O2S I 42m 4 2m

Other Jasmundite Information

Help on References: References: NAME( AntBidBlaNic2) 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 Jasmundite :
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: 09.AG.70





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