General Sodicanthophyllite Information
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Chemical Formula: |
NaMg7Si8O22(OH)2 |
Composition: |
Molecular Weight = 803.81 gm |
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Sodium 2.86 % Na 3.86 % Na2O |
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Magnesium 21.17 % Mg 35.10 % MgO |
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Silicon 27.95 % Si 59.80 % SiO2 |
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Hydrogen 0.25 % H 2.24 % H2O |
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Oxygen 47.77 % O |
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______ ______ |
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100.00 % 101.00 % = TOTAL OXIDE |
Empirical Formula: |
NaMg7(Si8O22)(OH)2 |
IMA Status: |
Approved IMA 1978 |
Locality: |
Link to MinDat.org Location Data. |
Name Origin: |
From its compostition and from the Latin anthophyllum - "clove" in allusion to the color. |
Synonym: |
Sodium-anthophyllite |
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Search for Sodicanthophyllite Images |
Images:
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Sodicanthophyllite Crystallography
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Axial Ratios: |
a:b:c =1.0335:1:0.296 |
Cell Dimensions: |
a = 18.5, b = 17.9, c = 5.3, Z = 4; V = 1,755.09 Den(Calc)= 3.04 |
Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma |
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Physical Properties of Sodicanthophyllite
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Color: |
Green, Brown. |
Hardness: |
5-6 - Between Apatite and Orthoclase |
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Optical Properties of Sodicanthophyllite
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Optical Data: |
NCalc= 1.64 - from Gladstone-Dale relationship (KC = 0.2095) where Ncalc=Dcalc*KC+1 |
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Calculated Properties of Sodicanthophyllite
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Electron Density: |
relectron=3.03 gm/cc note: rSodicanthophyllite =3.04 gm/cc. |
Fermion Index |
Fermion Index = 0.03444 Boson Index = 0.96556 |
Photoelectric: |
PESodicanthophyllite = 1.59 barns/electron U=PESodicanthophyllite x relectron= 4.81 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sodicanthophyllite is Not Radioactive |
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Sodicanthophyllite Classification
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Dana Class: |
66.1.2.4 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.1)Dana Type |
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(66.1.2)Group 1, the Mg-Fe-Mn-Li amphiboles (Orthorhombic) |
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66.1.2.1 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.2 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.2a Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m |
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66.1.2.3 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.3a Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m |
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66.1.2.3b Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m |
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66.1.2.4 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.4a Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.5 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.6 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.7 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.7a Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.8 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.9 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.10 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.11 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m |
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66.1.2.12 IMA2004-030! []Li2(Fe3Al2)S5(Si8O22)(OH)2 P nma 2/m 2/m 2/m |
Strunz Class: |
VIII/F.12-40 VIII - Silicates |
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VIII/F - Inosilicates (chain and band) double chains [Si4O11]6-, Orthorhombic Amphiboles |
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VIII/F.12 - Amphibole group, Magnesioholmquistite - Ferrogedrite series |
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VIII/F.12-10 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-20 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-30 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-40 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-45 Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-50 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-60 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-70 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-75 Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-80 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-90 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-100 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-110 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m |
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VIII/F.12-130 Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m |
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VIII/F.12-140* Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m |
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VIII/F.12-140 Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m |
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Other Sodicanthophyllite Information
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References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Sodicanthophyllite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 -QUT Mineral Atlas
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Print or Cut-and-Paste your Sodicanthophyllite Specimen Label here :
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Sodicanthophyllite
NaMg7Si8O22(OH)2
Dana No: 66.1.2.4 Strunz No: VIII/F.12-40
Locality:
Notes:
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