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Greenalite Mineral Data

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General Greenalite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Fe+++)2-3Si2O5(OH)4
Help on Composition: Composition: Molecular Weight = 354.28 gm
   Iron      44.14 %  Fe   46.64 % FeO / 11.27 % Fe2O3
   Silicon   17.44 %  Si   37.31 % SiO2
   Hydrogen   0.94 %  H     8.39 % H2O
   Oxygen    37.48 %  O
            ______        ______ 
            100.00 %      103.61 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+2.3Fe3+0.5Si2.2O5(OH)3.3
Help on Environment: Environment: A primary phase in some banded iron formations.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1903
Help on Locality: Locality: Biwabik Iron Formation, Mesabi Range, Minnesota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: In allusion to its green color.
Help on Name Pronunciation: Name Pronunciation: Greenalite + Pronunciation Say GREENALITE
 

Greenalite Image

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  Greenalite

Comments: Dark olive-green massive greenalite with metallic galena.
Location: La Union Mine, Murcia, Spain. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Greenalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5801:1:0.779
Help on Cell Dimensions: Cell Dimensions: a = 5.54, b = 9.55, c = 7.44, Z = 2; beta = 104.2° V = 381.60 Den(Calc)= 3.08
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.571(1), 7.12(0.8), 3.559(0.8),1.593(0.6), 1.553(0.4), 2.184(0.4), 2.849(0.2),
 

Physical Properties of Greenalite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue green, Light yellow green, Dark green, Black.
Help on Density: Density: 2.85 - 3.15, Average = 3
Help on Diaphaneity: Diaphaneity: Translucent to Subopaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Oolitic - < 3mm rounded spherical grains.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Earthy (Dull)
Help on Magnetism: Magnetism: Moderately Magnetic
Help on Streak: Streak: greenish gray
 

Optical Properties of Greenalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2176,KPDmeas= 0.2234,KC= 0.2293
Ncalc = 1.65 - 1.72
Help on Optical Data: Optical Data: Biaxial (+), a=1.65-1.675, b=1.674, g=1.674, bire=0.0010-0.0240, 2V(Meas)=0.
Help on Pleochroism (x): Pleochroism (x): pale yellow.
Help on Pleochroism (y): Pleochroism (y): green.
Help on Pleochroism (z): Pleochroism (z): green.
 

Calculated Properties of Greenalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Greenalite =3.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGreenalite = 13.80 barns/electron
U=PEGreenalite x rElectron Density= 40.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Greenalite is Not Radioactive
 

Greenalite Classification

Help on  Dana Class: Dana Class: 71.01.02b.04 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.02b)Serpentine group (Lizardite subgroup)
 
71.01.02b.01 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
71.01.02b.02 Lizardite Mg3Si2O5(OH)4 P1 1
 
71.01.02b.03 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
71.01.02b.04 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
Help on  Strunz Class: Strunz Class: 09.ED.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
 
09.ED.15 Clinochrysotile? Mg3Si2O5(OH)4 Cc, C 2/m Mono
 
09.ED.15 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
 
09.ED.15 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
 
09.ED.15 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
 
09.ED.15 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m
 
09.ED.15 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
09.ED.15 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
 
09.ED.15 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
 
09.ED.15 Chrysotile Mg3Si2O5(OH)4 A2/m 2/m
 
09.ED.15 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
09.ED.15 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
 
09.ED.15 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
 
09.ED.15 Maufite? (Mg,Ni)Al4Si3O13•4(H2O)(?) Mono ? Mono
 
09.ED.15 Lizardite Mg3Si2O5(OH)4 P1 1
 
09.ED.15 Orthochrysotile? Mg3Si2O5(OH)4 Unk Ortho
 
09.ED.15 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
 
09.ED.15 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m
 
09.ED.15 Parachrysotile? Mg3Si2O5(OH)4 Unk Ortho
 

Other Greenalite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Greenalite :
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 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Greenalite Specimen Label here :

Greenalite

(Fe++,Fe+++)2-3Si2O5(OH)4
Dana No: 71.01.02b.04 Strunz No: 09.ED.15
Locality:

 

Notes:

 

 
   
 


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