Ekmanite Mineral Data (original) (raw)
General Ekmanite Information
Chemical Formula:
(Fe++,Mg,Mn,Fe+++)3(Si,Al)4O10(OH)2•2(H2O)
Composition:
Molecular Weight = 440.08 gm
Magnesium 2.21 % Mg 3.66 % MgO
Manganese 3.75 % Mn 4.84 % MnO
Aluminum 6.13 % Al 11.58 % Al2O3
Iron 16.50 % Fe 16.33 % FeO / 5.44 % Fe2O3
Silicon 19.15 % Si 40.96 % SiO2
Hydrogen 1.37 % H 12.28 % H2O
Oxygen 50.90 % O
______ ______
100.00 % 95.09 % = TOTAL OXIDE
Empirical Formula:
Fe2+Mg0.4Mn2+0.3Fe3+0.3Si3AlO10(OH)2�2(H2O)
Environment:
Probably a Mn rich stilpnomelane.
IMA Status:
Discredited Am. Min. 1954 - Valid Species (Pre-IMA) 1892
Locality:
Brunsjogruvan, Gryhytte, Sweden. Link to MinDat.org Location Data.
Name Origin:
Unknown.
Search for Ekmanite Images
Images:
Ekmanite Crystallography
Crystal System:
OrthorhombicSpace Group: Unk
Physical Properties of Ekmanite
Cleavage:
{???} Good
Color:
Green, Gray white, Black.
Diaphaneity:
Translucent to Subopaque
Luster:
Sub Metallic
Optical Properties of Ekmanite
Optical Data:
Calculated Properties of Ekmanite
Fermion Index:
Fermion Index = 0.01
Boson Index = 0.99
Photoelectric:
PEEkmanite = 6.77 barns/electron
U=PEEkmanite x rElectron Density= . barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ekmanite is Not Radioactive
Ekmanite Classification
Dana Class:
71.00.00.00 (71)Phyllosilicate Minerals
(71.00)Without Dana Classification Numbers
(71.00.00)Phyllosilicate
71.00.00.00 Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono
71.00.00.00 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho
71.00.00.00 Griffithite* 4(Mg,Fe,Ca)O.(Al,Fe)2O3.5SiO2•7(H2O) Mono
71.00.00.00 Orlovite KLi2TiSi4O11F C 2 2
71.00.00.00 Shlykovite KCa[Si4O9(OH)]•3H2O P 21/c 2/m
71.00.00.00 Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono
71.00.00.00 Voloshinite Rb(LiAl1.5[]0.5)(Al0.5Si3.5)O10F2 C 2/c 2/m
Strunz Class:
09.EG.40 09 - SILICATES (Germanates)
09.E - Phyllosilicates
09.EG -Double nets with 6-membered and larger rings
09.EG.40 Franklinphilite (K,Na)4(Mn,Mg,Zn)48(Si,Al)72(O,OH)216•6(H2O) pseudo-HEX P1 or P1 Tri
09.EG.40 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho
09.EG.40 Lennilenapeite K6-7(Mg,Mn,Fe,Fe,Zn)48(Si,Al)72(O,OH)216•16(H2O) Unk (pseudo-HEX) Tri
09.EG.40 Parsettensite (K,Na,Ca)(Mn,Al)7Si8O20(OH)8•2(H2O)(?) C 2/m 2/m
09.EG.40 Stilpnomelane K(Fe,Mg,Fe)8(Si,Al)12(O,OH)27•n(H2O) P1 1
Other Ekmanite Information
References:
PHYS. PROP.(Larousse des Mineraux,1981)
See Also:
Links to other databases for Ekmanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Print or Cut-and-Paste your Ekmanite Specimen Label here :
Ekmanite
(Fe++,Mg,Mn,Fe+++)3(Si,Al)4O10(OH)2•2(H2O)
Dana No: 71.00.00.00 Strunz No: 09.EG.40
Locality:
Notes: