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Rustumite Mineral Data

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General Rustumite Information

Help on Chemical  Formula: Chemical Formula: Ca10(Si2O7)2(SiO4)Cl2(OH)2
Help on Composition: Composition: Molecular Weight = 934.12 gm
   Calcium   42.90 %  Ca   60.03 % CaO
   Silicon   15.03 %  Si   32.16 % SiO2
   Hydrogen   0.22 %  H     1.93 % H2O
   Chlorine   7.59 %  Cl    7.59 % Cl
               -   %   Cl   -1.71 % -O=Cl2   
   Oxygen    34.26 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca10(Si2O7)2(SiO4)Cl2(OH)2
Help on Environment: Environment: In limestones between two ring dikes, formed during a metamorphic period in which H2O:CO2 in the vapor phase was relatively high.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: In Scotland, from near Kilchoan, Ardnamurchan, Argyllshire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Rustum Roy (1924- ), experimental petrologist and materials scientist, Pennsylvania State University, University Park, Pennsylvania, USA.
Help on Name Pronunciation: Name Pronunciation: Rustumite + Pronunciation Say RUSTUMITE
Help on Synonym: Synonym: ICSD 20160
  PDF 18-305

Rustumite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Dellaite   Rustumite

Comments: White grains of dellaite, intermixed with rustumite.
Location: Queretaro, Zacatecas, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rustumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4107:1:0.8361
Help on Cell Dimensions: Cell Dimensions: a = 7.62, b = 18.55, c = 15.51, Z = 4; beta = 104.33° V = 2,124.14 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.881(1), 3.028(1), 3.189(0.58),

Physical Properties of Rustumite

Help on Cleavage: Cleavage: {100} Indistinct
Help on Color: Color: Colorless.
Help on Density: Density: 2.835
Help on Diaphaneity: Diaphaneity: Transparent
Help on Streak: Streak: white

Optical Properties of Rustumite

Help on Optical Data: Optical Data: NCalc= 1.65 - from Gladstone-Dale relationship (KC = 0.2235) where Ncalc=Dcalc*KC+1
NCalc= 1.63 - from Gladstone-Dale relationship (KC = 0.2235) where Ncalc=Dmeas*KC+1

Calculated Properties of Rustumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.91 gm/cc
note: Specific Gravity of Rustumite =2.92 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0077644616
Boson Index = 0.9922355384
Help on Photoelectric: Photoelectric: PERustumite = 6.33 barns/electron
U=PERustumite x rElectron Density= 18.43 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rustumite is Not Radioactive

Rustumite Classification

Help on  Dana Class: Dana Class: (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)
  (58.02.05)Dana Group Rustumite Ca10(Si2O7)2(SiO4)Cl2(OH)2 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.BG.30 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;
09.BG.30 Rustumite Ca10(Si2O7)2(SiO4)Cl2(OH)2 C 2/c 2/m

Other Rustumite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Rustumite :
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.BG.30





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