Mineralogy Database

Paraspurrite Mineral Data

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General Paraspurrite Information

Help on Chemical  Formula: Chemical Formula: Ca5(SiO4)2(CO3)
Help on Composition: Composition: Molecular Weight = 444.57 gm
   Calcium  45.08 %  Ca   63.07 % CaO
   Silicon  12.64 %  Si   27.03 % SiO2
   Carbon    2.70 %  C     9.90 % CO2
   Oxygen   39.59 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca5(SiO4)2(CO3)
Help on Environment: Environment: The dominant phase in a sequence of thermally metamorphosed siliceous carbonate rocks of the granulite facies.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Darwin mines, Darwin, Inyo Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named because of it's similarity to spurrite.
Help on Name Pronunciation: Name Pronunciation: Paraspurrite + Pronunciation Say PARASPURRITE

Paraspurrite Image

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

Comments: Violet-tinted gray crystalline pure paraspurrite mass with larnite veinlets.
Location: Near Darwin, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Paraspurrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5617:1:4.1425
Help on Cell Dimensions: Cell Dimensions: a = 10.473, b = 6.706, c = 27.78, Z = 8; beta = 90.58° V = 1,950.94 Den(Calc)= 3.03
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.47(1), 6.92(0.78), 1.983(0.63),

Physical Properties of Paraspurrite

Help on Cleavage: Cleavage: {001} Indistinct
Help on Color: Color: Colorless.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Transparent
Help on Streak: Streak: white

Optical Properties of Paraspurrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2199,KPDmeas= 0.2221,KC= 0.2096
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.65, b=1.672, g=1.677, bire=0.0270, 2V(Calc)=50, 2V(Meas)=47.

Calculated Properties of Paraspurrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Paraspurrite =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0069962935
Boson Index = 0.9930037065
Help on Photoelectric: Photoelectric: PEParaspurrite = 6.04 barns/electron
U=PEParaspurrite x rElectron Density= 18.27 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paraspurrite is Not Radioactive

Paraspurrite Classification

Help on  Dana Class: Dana Class: (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.01)with (CO3)
  (53.01.02)Dana Group Paraspurrite Ca5(SiO4)2(CO3) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.AH.15 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
09.AH.15 Paraspurrite Ca5(SiO4)2(CO3) P 21/a 2/m
09.AH.15 Spurrite Ca5(SiO4)2(CO3) P 21/a 2/m

Other Paraspurrite Information

Help on References: References: NAME( MinRec) 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 Paraspurrite :
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.AH.15





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