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Edenite

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Formula:
NaCa2Mg5(Si7Al)O22(OH)2
System:
Monoclinic
Colour:
White, grey, pale to ...
Lustre:
Vitreous
Hardness:
5 - 6
Name:
First mentioned in print in its mineralogical sense by Charles Upham Shepard in 1831, but he stated that the name was in common usage before 1831 and referred to the mineral's locality at Edenville, Orange Co., New York, USA. The first chemical analysis of edenite seems to be that published by Carl Rammelsberg in 1858.
This page provides mineralogical data about Edenite.


Classification of Edenite

Approved, 'Grandfathered' (first described prior to 1959)
9.DE.15

9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
66.1.3a.10

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup
16.11.12

16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis

Physical Properties of Edenite

Vitreous
Colour:
White, grey, pale to dark green, also brown and pale pinkish-brown
Streak:
White
Hardness (Mohs):
5 - 6
Cleavage:
Perfect
on {110}

Optical Data of Edenite

Type:
Biaxial (+)
RI values:
nα = 1.606 - 1.649 nβ = 1.617 - 1.660 nγ = 1.631 - 1.672
2V:
Measured: 52° to 83°, Calculated: 84° to 90°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak to distinct

Chemical Properties of Edenite

IMA Formula:
NaCa2Mg5(Si7Al)O22(OH)2
Mindat.org Formula:
{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2

The minerals in the edenite group is defined with A(Na+K+2Ca)≥0,5 apfu and C(Al+Fe3++2Ti)≤0,5 apfu and with (OH), F or Cl in the W position.

Edenite is defined with
A position: Na dominant
C position: Mg dominant
W position: (OH) dominant
Elements listed in formula:
Common Impurities:
Ti,Mn,K,P

Crystallography of Edenite

Crystal System:
Monoclinic
Cell Parameters:
a = 9.83Å, b = 17.95Å, c = 5.3Å
β = 105.18°
Ratio:
a:b:c = 0.548 : 1 : 0.295
Unit Cell Volume:
V 902.55 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of Edenite

Relationship of Edenite to other Species

Series:
Forms a series with Parvo-mangano-edenite (see here)
Forms a series with Pargasite (see here)
Other Members of Group:
Ferro-edenite{Na}{Ca2}{Fe52+}(AlSi7O22)(OH)2
Ferro-fluoro-edenite{Na}{Ca2}{Fe52+}(AlSi7O22)F2
Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2
Potassic-ferro-chloro-edenite{K}{Ca2}{Fe52+}(AlSi7O22)(Cl,OH)2
9.DE.05Anthophyllite◻Mg2Mg5Si8O22(OH)2
9.DE.05Cummingtonite◻Mg2Mg5Si8O22(OH)2
9.DE.05Clino-holmquistite Root Name☐{Li2}{Z32+Z23+}(Si8O22)(OH,F,Cl)2
9.DE.05Grunerite◻Fe22+Fe52+Si8O22(OH)2
9.DE.05Manganocummingtonite◻Mn2Mg5Si8O22(OH)2
9.DE.05Manganogrunerite◻Mn2Fe52+Si8O22(OH)2
9.DE.05Permanganogrunerite☐{Mn22+}{Mn52+}(Si8O22)(OH)2
9.DE.05Ferro-fluoro-pedrizite{Na}{Li2}{Fe2Al2Li}(Al2Si6O22)F2
9.DE.05Ferri-fluoro-leakeiteNaNa2(Mg2Fe23+Li)Si8O22F2
9.DE.10ActinoliteCa2(Mg4.5-2.5Fe2+0.5-2.5)Σ=5Si8O22(OH)2
9.DE.10Ferri-tschermakite☐{Ca2}{Mg3Fe23+}(Al2Si6O22)(OH)2
9.DE.10Ferro-actinolite◻Ca2Mg2.5-0Fe2+2.5-5Si8O22(OH)2
9.DE.10Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
9.DE.10Ferro-tschermakite☐{Ca2}{Fe32+Al2}(Al2Si6O22)(OH)2
9.DE.10JoesmithitePbCa2Mg3Fe23+(Si6Be2)O22(OH)2
9.DE.10Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
9.DE.10Tremolite◻Ca2Mg5Si8O22(OH)2
9.DE.10Tschermakite◻Ca2(Mg3Al2)Si6Al2O22(OH)2
9.DE.10CannilloiteCa(Ca2)(Mg4Al)(Al3Si5O22)(OH)2
9.DE.10Fluoro-cannilloiteCaCa2(Mg4Al)(Si5Al3)O22F2
9.DE.10Parvo-manganotremolite☐{CaMn2+}{Mg5}(Si8O22)(OH)2
9.DE.10Fluoro-tremolite◻Ca2Mg5Si8O22F2
9.DE.10Potassic-fluoro-pargasiteKCa2(Mg4Al)Si6Al2O22F2
9.DE.15Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
9.DE.15Ferro-kaersutite{Na}{Ca2}{Fe32+AlTi}(Al2Si6O22)O2
9.DE.15Ferro-pargasiteNaCa2(Fe42+Al)(Si6Al2)O22(OH)2
9.DE.15HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
9.DE.15KaersutiteNaCa2(Mg3Ti4+Al)(Si6Al2)O22O2
9.DE.15Magnesio-hastingsiteNaCa2(Mg4Fe3+)Si6Al2O22(OH)2
9.DE.15PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
9.DE.15SadanagaiteNaCa2(Mg3Al2)(Si5Al3)O22(OH)2
9.DE.15Fluoro-edeniteNaCa2Mg5(Si7Al)O22F2
9.DE.15Potassic-ferro-ferri-sadanagaiteKCa2(Fe32+Fe23+)(Si5Al3)O22(OH)2
9.DE.15Potassic-sadanagaiteKCa2Mg3Al2(Si5Al3)O22(OH)2
9.DE.15Potassic-pargasiteKCa2(Mg4Al)(Si6Al2)O22(OH)2
9.DE.15Potassic-ferro-sadanagaiteKCa2(Fe32+Al2)(Si5Al3)O22(OH)2
9.DE.15Magnesio-fluoro-hastingsiteNaCa2(Mg4Fe3+)(Si6Al2)O22F2
9.DE.15Potassic-fluoro-hastingsiteKCa2(Fe42+Fe3+)(Si6Al2)O22F2
9.DE.15Potassic-chloro-hastingsiteKCa2[Fe42+Fe3+](Si6Al2)O22Cl2
9.DE.15Fluoro-pargasiteNaCa2(Mg4Al)(Si6Al2)O22F2
9.DE.15Parvo-mangano-edenite{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2
9.DE.15Potassic-chloro-pargasiteKCa2(Mg4Al)(Si6Al2)O22Cl2
9.DE.15Potassic-ferro-chloro-edenite{K}{Ca2}{Fe52+}(AlSi7O22)(Cl,OH)2
9.DE.15Potassic-magnesio-hastingsiteKCa2(Mg4Fe3+)(Si6Al2)O22(OH)2
9.DE.15Potassic-ferro-pargasiteKCa2(Fe42+Al)Si6Al2O22(OH)2
9.DE.15Chromio-pargasiteNaCa2(Mg4Cr)(Si6Al2)O22(OH)2
9.DE.20Ferro-taramiteNa(NaCa)Fe32+Al2(Si6Al2)O22(OH)2
9.DE.20Barroisite◻NaCa[Mg3Al2](Si7Al)O22(OH)2
9.DE.20Ferro-ferri-barroisite☐(CaNa)(Fe32+Fe23+)(AlSi7O22)(OH)2
9.DE.20Ferro-ferri-winchite☐[CaNa][Fe42+(Fe3+,Al)]Si8O22(OH)2
9.DE.20Ferri-barroisite☐(CaNa)(Mg3Fe23+)(AlSi7O22)(OH)2
9.DE.20Ferro-ferri-taramiteNa(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2
9.DE.20Ferro-ferri-katophoriteNa(NaCa)(Fe42+Fe3+)(Si7Al)O22(OH)2
9.DE.20Ferro-barroisite☐{CaNa}{Fe32+Al2}(AlSi7O22)(OH)2
9.DE.20Ferro-richteriteNa2CaFe52+Si8O22(OH)2
9.DE.20Ferro-winchite ☐{CaNa}{Fe42+Al}(Si8O22)(OH)2
9.DE.20Ferro-katophoriteNaNaCa[Fe42+Al](Si7Al)O22(OH)2
9.DE.20Ferri-taramiteNa(CaNa)(Mg3Fe23+)(Al2Si6O22)(OH)2
9.DE.20Magnesiotaramite{Na}{CaNa}{Mg3AlFe3+}(Al2Si6O22)(OH)2
9.DE.20RichteriteNa2CaMg5Si8O22(OH)2
9.DE.20Winchite◻NaCa(Mg4Al)Si8O22(OH)2
9.DE.20TaramiteNa(NaCa)(Mg3Al2)(Si6Al2)O22(OH)2
9.DE.20Fluoro-richteriteNa(NaCa)Mg5Si8O22F2
9.DE.20KatophoriteNaNaCa(Mg4Al)(Si7Al)O22(OH)2
9.DE.20Potassic-fluoro-richteriteK(NaCa)Mg5Si8O22F2
9.DE.20Potassic-richteriteK[CaNa][Mg5]Si8O22(OH)2
9.DE.20Ferri-ghoseite◻(NaMn2+)(Mg4Fe3+)Si8O22(OH)2
9.DE.20Ferri-winchite◻NaCa(Mg4Fe3+)Si8O22(OH)2
9.DE.20Fluoro-taramiteNa(NaCa)(Mg3Al2)(Si6Al2)O22F2
9.DE.25ArfvedsoniteNaNa2(Fe42+Fe3+)Si8O22(OH)2
9.DE.25EckermanniteNaNa2(Mg4Al)Si8O22(OH)2
9.DE.25Ferro-eckermanniteNaNa2(Fe42+Al)Si8O22(OH)2
9.DE.25Ferro-glaucophane◻Na2(Fe32+Al2)Si8O22(OH)2
9.DE.25Glaucophane◻Na2(Mg3Al2)Si8O22(OH)2
9.DE.25Potassic-mangani-leakeiteKNa2(Mg2Mn23+Li)Si8O22(OH)2
9.DE.25Mangano-ferri-eckermanniteNaNa2(Mn42+Fe3+)Si8O22(OH)2
9.DE.25Ferri-leakeiteNa(NaLi)(Mg2Fe23+Li)Si8O22(OH)2
9.DE.25Magnesio-riebeckite◻Na2(Mg3Fe23+)Si8O22(OH)2
9.DE.25Magnesio-arfvedsoniteNaNa2(Mg4Fe3+)Si8O22(OH)2
9.DE.25NybøiteNaNa2(Mg3Al2)(Si7Al)O22(OH)2
9.DE.25Riebeckite◻Na2(Fe32+Fe23+)Si8O22(OH)2
9.DE.25Mangano-mangani-ungarettiiteNaNa2(Mn22+Mn33+)Si8O22O2
9.DE.25Ferro-ferri-nybøiteNaNa2(Fe32+Fe23+)(Si7Al)O22(OH)2
9.DE.25Clino-ferro-ferri-holmquistite◻Li2(Fe32+Fe23+)Si8O22(OH)2
9.DE.25Ferri-nybøiteNaNa2(Mg3Fe23+](AlSi7O22)(OH)2
9.DE.25Ferro-ferri-leakeite[Na][Na2][Fe22+Fe23+Li]Si8O22(OH)2
9.DE.25Ferro-ferri-fluoro-leakeiteNaNa2(Fe22+Fe23+Li)Si8O22F2
9.DE.25Sodic-ferri-clinoferroholmquistiteNa0.5{Li2}{Fe32+Fe23+}(Si8O22)(OH)2
9.DE.25Magnesio-fluoro-arfvedsoniteNaNa2(Mg4Fe3+)Si8O22F2
9.DE.25Ferri-pedrizite[Na][Li2][Mg2Fe23+Li]Si8O22(OH)2
9.DE.25Potassic-ferri-leakeiteKNa2Mg2Fe23+LiSi8O22(OH)2
9.DE.25Fluoro-nybøiteNaNa2(Mg3Al2)(Si7Al)O22F2
9.DE.25Mangani-dellaventuraiteNaNa2(MgMn23+LiTi4+)Si8O22O2
9.DE.25Fluoro-pedriziteNaLi2(Mg2Al2Li)(Si8O22)F2
9.DE.25Potassic-arfvedsoniteKNa2Fe42+Fe3+Si8O22(OH)2
9.DE.25Mangani-obertiiteNaNa2(Mg3Mn3+Ti4+)Si8O22O2
9.DE.25Potassic-magnesio-fluoro-arfvedsoniteKNa2(Mg4Fe3+)Si8O22F2
9.DE.25Ferro-ferri-pedriziteNaLi2(LiFe22+Fe23+)Si8O22(OH)2
9.DE.25Potassic-magnesio-arfvedsonite[K][Na2][Mg4Fe3+]Si8O22(OH)2
9.DE.25PedriziteNaLi2(LiMg2Al2)(Si8O22)(OH)2
9.DE.25Ferro-pedriziteNaLi2(Fe22+Al2Li)Si8O22(OH)2
9.DE.25Fluoro-leakeiteNaNa2(Mg2Al2Li)Si8O22F2
9.DE.25Ferro-ferri-obertiiteNaNa2(Fe32+Fe3+Ti)Si8O22O2
16.11.1MadisoniteCa2Mg2Al2Si3O13 or near
16.11.3Alumino-magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
16.11.4Tschermakite◻Ca2(Mg3Al2)Si6Al2O22(OH)2
16.11.5ClintoniteCaAlMg2(SiAl3)O10(OH)2
16.11.6JuaniteCa10(Mg,Fe2+)4(Si,Al)13(O,OH)39 · 4H2O
16.11.7Pumpellyite-(Mg)Ca2MgAl2(SiO4)(Si2O7)(OH)2 · H2O
16.11.8TacharaniteCa12Al2Si18O33(OH)36
16.11.9Aluminobarroisite☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2
16.11.10TaramiteNa(NaCa)(Mg3Al2)(Si6Al2)O22(OH)2
16.11.13PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
16.11.14KatophoriteNaNaCa(Mg4Al)(Si7Al)O22(OH)2
16.11.15Beidellite(Na,Ca)0.3Al2(Si,Al)4O10(OH)2 · nH2O
16.11.15Magnesiosadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2
16.11.16SadanagaiteNaCa2(Mg3Al2)(Si5Al3)O22(OH)2

Other Names for Edenite

Name in Other Languages:
German:Edenit
Russian:Эденит
Simplified Chinese:浅闪石
Spanish:Edenita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Edenite

Reference List:
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.

Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.

Ishida, K., Hawthorne, F.C. (2006) Assignment of infrared OH-stretching bands in calcic amphiboles through deuteration and heat treatment. American Mineralogist: 91: 871-879.

Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for Edenite

mindat.org URL:
http://www.mindat.org/min-1351.html
Please feel free to link to this page.

Localities for Edenite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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