Eakerite Mineral Data + 
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- 72.1.5.1 Eakerite Ca2SnAl2Si6O18(OH)2·2(H2O) P 21/a 2/m
- VIII/G.02-10 Eakerite Ca2SnAl2Si6O18(OH)2·2(H2O) P 21/a 2/m
General Eakerite Information |
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 Chemical Formula: |
Ca2SnAl2Si6O18(OH)2·2(H2O) | ||
| Composition: |
Molecular Weight = 779.38 gm | ||
| Calcium 10.28 % Ca 14.39 % CaO | |||
| Aluminum 6.92 % Al 13.08 % Al2O3 | |||
| Silicon 21.62 % Si 46.26 % SiO2 | |||
| Tin 15.23 % Sn 19.34 % SnO2 | |||
| Hydrogen 0.78 % H 6.93 % H2O | |||
| Oxygen 45.16 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca2SnAl2Si6O18(OH)2·2(H2O) | ||
| IMA Status: |
Approved IMA 1970 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Name Origin: |
Named in honor of Mr. Jack Eaker who was a mining engineer at the Foote lithium Company spodumene mine at King's Mountain, NC. | ||
| Synonym: |
ICSD 12126 | ||
| PDF 24-218 | |||
Eakerite Image | |||
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Images:
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Eakerite Crystallography |
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| Axial Ratios: |
a:b:c =2.0582:1:0.9633 | ||
| Cell Dimensions: |
a = 15.892, b = 7.721, c = 7.438, Z = 2; beta = 101.32° V = 894.90 Den(Calc)= 2.89 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | ||
| X Ray Diffraction: |
By Intensity(I/Io): 4.812(1), 5.257(0.9), 7.31(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Eakerite |
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| Cleavage: |
None | ||
| Color: |
Colorless, White. | ||
| Density: |
2.93 | ||
| Diaphaniety: |
Transparent | ||
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
| Hardness: |
5.5 - Knife Blade | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Eakerite |
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| Gladstone-Dale: |
CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2042,KPDmeas= 0.2014,KC= 0.2047 |
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| Optical Data: |
Biaxial (+), a=1.584, b=1.586, g=1.6, bire=0.0160, 2V(Calc)=42, 2V(Meas)=35. | ||
Calculated Properties of Eakerite |
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| Electron Density: |
relectron=2.83 gm/cc |
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| Fermion Index |
Fermion Index = 0.03576 Boson Index = 0.96424 |
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| Photoelectric: |
PEEakerite = 45.15 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Eakerite is Not Radioactive |
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Eakerite Classification |
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| Dana Class: |
72.1.5.1 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings | ||
| (72.1)with 4-membered rings | |||
| (72.1.5)Dana Group | |||
| Strunz Class: |
VIII/G.02-10 VIII - Silicates | ||
| VIII/G - Intermediate between chain- and layered silicates | |||
| VIII/G.02 - Eakerite series | |||
Other Eakerite 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 Eakerite : 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 Eakerite using: Visit our Advertisers for Eakerite : Translate Eakerite Mineral Data : Ask about Eakerite here : Print or Cut-and-Paste your Eakerite Specimen Label here :
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