Stringhamite Mineral Data + 
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- 78.1.9.1 Stringhamite CaCuSiO4·2(H2O) P 21/c 2/m
- VIII/B.25-10 Stringhamite CaCuSiO4·2(H2O) P 21/c 2/m
- VIII/B.25-20 Clinohedrite CaZnSiO4·(H2O) Aa m
General Stringhamite Information |
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 Chemical Formula: |
CaCuSiO4·2(H2O) | ||
| 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 | |||
| Empirical Formula: |
CaCu(SiO4)·2(H2O) | ||
| Environment: |
Found with secondary and primary copper minerals in a diopside-magnetite skarn. | ||
| IMA Status: |
Approved IMA 1976 | ||
| Locality: |
Bawana mine, near Milford, Beaver County, Utah. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Bronson F. Stringham (1907-1968), University of Utah. | ||
| Synonym: |
ICSD 30926 | ||
| PDF 29-318 | |||
Stringhamite Image | |||
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Images:
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Stringhamite Crystallography |
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| Axial Ratios: |
a:b:c =0.3117:1:0.3311 | ||
| Cell Dimensions: |
a = 5.03, b = 16.135, c = 5.343, Z = 4; beta = 102.96° V = 422.59 Den(Calc)= 3.64 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.768(1), 2.523(0.4), 3.236(0.39), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Stringhamite |
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| Cleavage: |
[001] Good, [100] Imperfect | ||
| Color: |
Azure, Blue violet, Dark blue. | ||
| Density: |
3.67 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
light blue | ||
Optical Properties of Stringhamite |
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| 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 |
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| Optical Data: |
Biaxial (+), a=1.709, b=1.717, g=1.729, bire=0.0200, 2V(Calc)=80, 2V(Meas)=80. | ||
| Pleochroism (x): |
dark blue. | ||
| Pleochroism (y): |
blue. | ||
| Pleochroism (z): |
light blue. | ||
Calculated Properties of Stringhamite |
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| Electron Density: |
relectron=3.61 gm/cc |
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| Fermion Index |
Fermion Index = 0.00609 Boson Index = 0.99391 |
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| Photoelectric: |
PEStringhamite = 14.29 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Stringhamite is Not Radioactive |
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Stringhamite Classification |
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| Dana Class: |
78.1.9.1 (78)Unclassified silicates | ||
| (78.1)possible nesosilicates | |||
| (78.1.9)Dana Group | |||
| Strunz Class: |
VIII/B.25-10 VIII - Silicates | ||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cationes with coordinationnumber between [8] and [12] | |||
| VIII/B.25 - Stringhamite - Clinohedrite series | |||
Other Stringhamite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Stringhamite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Stringhamite using: Visit our Advertisers for Stringhamite : Translate Stringhamite Mineral Data : Ask about Stringhamite here : Print or Cut-and-Paste your Stringhamite Specimen Label here :
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