Harstigite Mineral Data + 
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- 57.1.1.1 Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m
- 57.1.1.2 Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m
- VIII/C.21-10 Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m
General Harstigite Information |
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 Chemical Formula: |
Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 | ||
| Composition: |
Molecular Weight = 885.97 gm | ||
| Calcium 27.14 % Ca 37.98 % CaO | |||
| Manganese 6.20 % Mn 8.01 % MnO | |||
| Beryllium 4.07 % Be 11.29 % BeO | |||
| Silicon 19.02 % Si 40.69 % SiO2 | |||
| Hydrogen 0.23 % H 2.03 % H2O | |||
| Oxygen 43.34 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca6Mn2+Be4(SiO4)2(Si2O7)2(OH)2 | ||
| Environment: |
Occurs with garnet and rhodonite. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1886 | ||
| Locality: |
Harstig mine, Pajsberg, near Persber, Vermland, Switzerland. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after its locality. | ||
| Synonym: |
ICSD 64790 | ||
| PDF 20-200 | |||
Search for Harstigite Images | |||
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Images:
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Harstigite Crystallography |
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| Axial Ratios: |
a:b:c =1.0205:1:0.7107 | ||
| Cell Dimensions: |
a = 13.9, b = 13.62, c = 9.68, Z = 4; V = 1,832.60 Den(Calc)= 3.21 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcmn | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.695(1), 2.788(0.5), 2.817(0.5), | ||
Physical Properties of Harstigite |
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| Cleavage: |
None | ||
| Color: |
Colorless, White. | ||
| Density: |
3.16 | ||
| Diaphaniety: |
Translucent | ||
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. | ||
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
| Hardness: |
5.5 - Knife Blade | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Harstigite |
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| Gladstone-Dale: |
CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2119,KPDmeas= 0.2153,KC= 0.2142 |
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| Optical Data: |
Biaxial (+), a=1.678, b=1.68, g=1.683, bire=0.0050, 2V(Calc)=80, 2V(Meas)=52. | ||
Calculated Properties of Harstigite |
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| Electron Density: |
relectron=3.13 gm/cc |
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| Fermion Index |
Fermion Index = 0.05014 Boson Index = 0.94986 |
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| Photoelectric: |
PEHarstigite = 5.67 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Harstigite is Not Radioactive |
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Harstigite Classification |
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| Dana Class: |
57.1.1.2 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups | ||
| (57.1)with [Si3O10] groups | |||
| (57.1.1)Aminoffite and related species | |||
| Strunz Class: |
VIII/C.21-10 VIII - Silicates | ||
| VIII/C - Sorosilicates, mixed structure with [SiO4]2- "inseln" and [Si2O7]6- groups | |||
| VIII/C.21 - Harstigite series | |||
Other Harstigite Information |
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| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Harstigite : 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 Harstigite using: Visit our Advertisers for Harstigite : Translate Harstigite Mineral Data : Ask about Harstigite here : Print or Cut-and-Paste your Harstigite Specimen Label here :
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