Paraspurrite Mineral Data

General Paraspurrite Information

Chemical Formula:

Ca5(SiO4)2(CO3)

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

Empirical Formula:

Ca₅(SiO₄)₂(CO₃)

Environment:

The dominant phase in a sequence of thermally metamorphosed siliceous carbonate rocks of the granulite facies.

IMA Status:

Approved IMA 1977

Locality:

Darwin mines, Darwin, Inyo Co., California. Link to MinDat.org Location Data.

Name Origin:

Named because of it's similarity to spurrite.

Name Pronunciation:

Paraspurrite + Pronunciation

Paraspurrite Image

Images:

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

Axial Ratios:

a:b:c =1.5617:1:4.1425

Cell Dimensions:

a = 10.473, b = 6.706, c = 27.78, Z = 8; beta = 90.58° V = 1,950.94 Den(Calc)= 3.03

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/I_o): 3.47(1), 6.92(0.78), 1.983(0.63),

Physical Properties of Paraspurrite

Cleavage:

{001} Indistinct

Color:

Colorless.

Density:

Diaphaneity:

Transparent

Streak:

white

Optical Properties of Paraspurrite

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

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

Electron Density:

Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Paraspurrite =3.03 gm/cc.

Fermion Index:

Fermion Index = 0.0069962935
Boson Index = 0.9930037065

Photoelectric:

PE_Paraspurrite= 6.04 barns/electron
U=PE_Paraspurrite x rElectron Density= 18.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paraspurrite is Not Radioactive

Paraspurrite Classification

Dana Class:

53.01.02.01 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations

(53.01)with (CO3)

(53.01.02)Dana Group

53.01.02.01 Paraspurrite Ca5(SiO4)2(CO3) P 2₁/a 2/m

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

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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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Paraspurrite

Ca5(SiO4)2(CO3)
Dana No: 53.01.02.01 Strunz No: 09.AH.15
Locality:

Notes:

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