| Chesterite Mineral Data |
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- 68.1.1.1 Chesterite (Mg,Fe)17Si20O54(OH)6 A21ma mm2
- VIII/F.13-10 Chesterite (Mg,Fe)17Si20O54(OH)6 A21ma mm2
- VIII/F.13-20 Clinojimthompsonite (Mg,Fe)5Si6O16(OH)2 C 2/c 2/m
- VIII/F.13-30 Jimthompsonite (Mg,Fe)5Si6O16(OH)2 P bca 2/m 2/m 2/m
General Chesterite Information |
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 Chemical Formula: |
(Mg,Fe++)17Si20O54(OH)6 | ||
| Composition: |
Molecular Weight = 2,074.96 gm | ||
| Magnesium 14.93 % Mg 24.77 % MgO | |||
| Iron 11.44 % Fe 14.72 % FeO | |||
| Silicon 27.07 % Si 57.91 % SiO2 | |||
| Hydrogen 0.29 % H 2.60 % H2O | |||
| Oxygen 46.26 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg12.75Fe2+4.25Si20O54(OH)6 | ||
| IMA Status: |
Approved IMA 1978 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 100659 | ||
| PDF 31-637 | |||
Chesterite Image | |||
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Images:
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Chesterite Crystallography |
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| Axial Ratios: |
a:b:c =0.4108:1:0.1169 | ||
| Cell Dimensions: |
a = 18.614, b = 45.306, c = 5.2966, Z = 4; V = 4,466.76 Den(Calc)= 3.09 | ||
| Crystal System: |
Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: A21ma | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.609(1), 3.076(0.66), 3.246(0.49), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Chesterite |
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| Cleavage: |
[110] Perfect | ||
| Color: |
Colorless, Pink brown. | ||
| Density: |
3.23 | ||
| Diaphaniety: |
Transparent | ||
| Hardness: |
2-2.5 - Gypsum-Finger Nail | ||
| Luster: |
Silky - Pearly | ||
| Streak: |
white | ||
Optical Properties of Chesterite |
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| Gladstone-Dale: |
CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2038,KPDmeas= 0.1949,KC= 0.2065 |
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| Optical Data: |
Biaxial (-), a=1.617, b=1.632, g=1.64, bire=0.0230, 2V(Calc)=70, 2V(Meas)=71. | ||
Calculated Properties of Chesterite |
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| Electron Density: |
relectron=3.07 gm/cc |
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| Fermion Index |
Fermion Index = 0.03022 Boson Index = 0.96978 |
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| Photoelectric: |
PEChesterite = 4.73 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chesterite is Not Radioactive |
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Chesterite Classification |
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| Dana Class: |
68.1.1.1 (68)Inosilicate Structures with Chains of More Than One Width | ||
| (68.1)Dana Type | |||
| (68.1.1)Dana Group | |||
| Strunz Class: |
VIII/F.13-10 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) double chains [Si4O11]6-, Orthorhombic Amphiboles | |||
| VIII/F.13 - Amphibole group, Chesterite - Jimthomsonite series | |||
Other Chesterite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Chesterite : 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 Chesterite using: Visit our Advertisers for Chesterite : Translate Chesterite Mineral Data : Ask about Chesterite here : Print or Cut-and-Paste your Chesterite Specimen Label here :
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