Mineralogy Database

Spurrite Mineral Data

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General Spurrite 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: Contact zone between limestone and diorite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1908
Help on Locality: Locality: Velardena mining district, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Josiah Edward Spurr (1870-1950), American geologist.
Help on Name Pronunciation: Name Pronunciation: Spurrite Say SPURRITE
Help on Synonym: Synonym: ICSD 25830
  PDF 13-496

Spurrite Image

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  Bredigite   Spurrite

Comments: White veins of bredigite in massive gray spurrite (slabbed specimen).
Location: Camphouse, Ardnamurchan, Argyll, Highland, Scotland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Comments: Dark to light purple massive spurrite (cut face).
Location: South Sister Peak, Tres Hermanas Mountains, Luna County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Spurrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5645:1:2.1103
Help on Cell Dimensions: Cell Dimensions: a = 10.49, b = 6.705, c = 14.15, Z = 4; beta = 101.317° V = 975.90 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): 2.701(1), 2.646(0.65), 2.667(0.6),

Physical Properties of Spurrite

Help on Cleavage: Cleavage: {100} Distinct
Help on Color: Color: Gray, Gray white, Lilac gray.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Cleaveable - Easily cleaved into fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Luminescence, Short UV=Green.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Spurrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.058 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2195,KPDmeas= 0.2217,KC= 0.2096
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.64-1.641, b=1.674-1.676, g=1.679-1.681, bire=0.0390-0.0400
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Spurrite

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

Spurrite Classification

Help on  Dana Class: Dana Class: (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.01)with (CO3)
  (53.01.01)Dana Group Spurrite 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 Spurrite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Spurrite :
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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