Mineralogy Database

Stringhamite Mineral Data

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General Stringhamite Information

Help on Chemical  Formula: Chemical Formula: CaCuSiO4•2(H2O)
Help on Composition: Composition: Molecular Weight = 231.74 gm
   Calcium   17.29 %  Ca   24.20 % CaO
   Copper    27.42 %  Cu   34.33 % CuO
   Silicon   12.12 %  Si   25.93 % SiO2
   Hydrogen   1.74 %  H    15.55 % H2O
   Oxygen    41.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaCu(SiO4)•2(H2O)
Help on Environment: Environment: Found with secondary and primary copper minerals in a diopside-magnetite skarn.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: Bawana mine, near Milford, Beaver County, Utah. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Bronson F. Stringham (1907-1968), University of Utah.
Help on Name Pronunciation: Name Pronunciation: Stringhamite + Pronunciation Say STRINGHAMITE
Help on Synonym: Synonym: ICSD 30926
  PDF 29-318

Stringhamite Image

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  Stringhamite   Wollastonite-1A

Comments: Rounded aggregate of dark blue stringhamite crystals on bladed, white wollastonite.
Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Stringhamite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3117:1:0.3311
Help on Cell Dimensions: Cell Dimensions: a = 5.03, b = 16.135, c = 5.343, Z = 4; beta = 102.96° V = 422.59 Den(Calc)= 3.64
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.768(1), 2.523(0.4), 3.236(0.39),

Physical Properties of Stringhamite

Help on Cleavage: Cleavage: {001} Good, {100} Imperfect
Help on Color: Color: Azure, Blue violet, Dark blue.
Help on Density: Density: 3.67
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light blue

Optical Properties of Stringhamite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.094 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.086 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1973,KPDmeas= 0.1957,KC= 0.216
Ncalc = 1.79
Help on Optical Data: Optical Data: Biaxial (+), a=1.709, b=1.717, g=1.729, bire=0.0200, 2V(Calc)=80, 2V(Meas)=80.
Help on Pleochroism (x): Pleochroism (x): dark blue.
Help on Pleochroism (y): Pleochroism (y): blue.
Help on Pleochroism (z): Pleochroism (z): light blue.

Calculated Properties of Stringhamite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Stringhamite =3.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0060947417
Boson Index = 0.9939052583
Help on Photoelectric: Photoelectric: PEStringhamite = 14.29 barns/electron
U=PEStringhamite x rElectron Density= 51.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stringhamite is Not Radioactive

Stringhamite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.01)possible nesosilicates
  (78.01.09)Dana Group Stringhamite CaCuSiO4•2(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 09.AE.35 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AE -Nesosilicates with additional (O,OH,F,H2O);
09.AE.35 Stringhamite CaCuSiO4•2(H2O) P 21/c 2/m

Other Stringhamite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Stringhamite :
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.AE.35





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