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General Edenite Information |
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 Chemical Formula: |
NaCa2Mg5Si7AlO22(OH)2 | ||
| Composition: |
Molecular Weight = 834.25 gm | ||
| Sodium 2.76 % Na 3.71 % Na2O | |||
| Calcium 9.61 % Ca 13.44 % CaO | |||
| Magnesium 14.57 % Mg 24.16 % MgO | |||
| Aluminum 3.23 % Al 6.11 % Al2O3 | |||
| Silicon 23.57 % Si 50.42 % SiO2 | |||
| Hydrogen 0.24 % H 2.16 % H2O | |||
| Oxygen 46.03 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
NaCa2Mg5Si7AlO22(OH)2 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1839 | ||
| Locality: |
Edenville, Orange County, New York, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Edenite  |
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| Synonym: |
ICSD 39894 | ||
| PDF 31-1228 | |||
Edenite Image | |||
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Images:
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Images:
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Edenite Crystallography |
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| Axial Ratios: |
a:b:c =0.5479:1:0.2955 | ||
| Cell Dimensions: |
a = 9.837, b = 17.954, c = 5.307, Z = 2; beta = 105.18° V = 904.58 Den(Calc)= 3.06 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.12(1), 8.43(0.8), 3.267(0.4), | ||
Physical Properties of Edenite |
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| Cleavage: |
{110} Perfect, {010} Distinct | ||
| Color: |
Bluish green, Colorless, Gray, White, Light green. | ||
| Density: |
3 - 3.059, Average = 3.02 | ||
| Diaphaneity: |
Transparent to translucent | ||
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Hardness: |
6 - Orthoclase | ||
| Luminescence: |
Fluorescent, Short UV=pale green-blue. | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Edenite |
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| Gladstone-Dale: |
CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2089,KPDmeas= 0.211,KC= 0.2085 Ncalc = 1.63 - 1.64 |
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| Optical Data: |
Biaxial (+), a=1.606-1.649, b=1.617-1.66, g=1.631-1.672, bire=0.0230-0.0250, 2V(Calc)=84-90, 2V(Meas)=52-83. Dispersion weak to distinct, r > v. | ||
| Pleochroism (x): |
colorless, pale gray, colorless, greenish yellow, or pale green. | ||
| Pleochroism (y): |
colorless, pale brown, light green, emerald green, or green. | ||
| Pleochroism (z): |
colorless, pale bluish gray, light brownish green, greenish blue, or greenish ping. | ||
Calculated Properties of Edenite |
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| Electron Density: |
Bulk Density (Electron Density)=3.05 gm/cc note: Specific Gravity of Edenite =3.06 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.02 Boson Index = 0.98 |
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| Photoelectric: |
PEEdenite = 2.55 barns/electron U=PEEdenite x rElectron Density= 7.77 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Edenite is Not Radioactive |
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Edenite Classification |
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| Dana Class: |
66.01.03a.10 (66)Inosilicate Double-Width Unbranched Chains, W=2 | ||
| (66.01)with P=2 amphibole configuration | |||
| (66.01.03a)Group 2, the calcic amphiboles | |||
| Strunz Class: |
09.DE.10 09 - SILICATES (Germanates) | ||
| 09.D - Inosilicates* Structural terminology according to Liebau (1985) | |||
| 09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family | |||
Other Edenite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | ||
| See Also: |
Links to other databases for Edenite : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 - Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Athena 6 - EUROmin Project 7 - Ecole des Mines de Paris 8 - Franklin Minerals(Dunn) 9 - Franklin Minerals(Palache) 10 - GeoScienceWorld 11 - Google Images 12 - Google Scholar 13 - Handbook of Mineralogy (MinSocAm) 14 - Handbook of Mineralogy (UofA) 15 - HyperPhysics 16 - MinDAT 17 - Mineralienatlas (Deutsch) 18 - Online Mineral Museum 19 - QUT Mineral Atlas 20 - Ruff.Info 21 - WWW-MINCRYST Search for Edenite using: Visit our Advertisers for Edenite : A Bijoux Google Search for EdeniteAdam's Minerals Google Search for Edenite Cape Minerals Google Search for Edenite Dakota Matrix Minerals Google Search for Edenite Excalibur Mineral Corp. Google Search for Edenite Exceptional Minerals Google Search for Edenite John Betts Fine Minerals Search for Edenite McDougall Minerals Google Search for Edenite Mineral News Website Link Rock and Mineral Shows Google Search for Edenite Weinrich Minerals, Inc. Google Search for Edenite Ask about Edenite here : Print or Cut-and-Paste your Edenite Specimen Label here :
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