Greenalite Mineral Data + Say GREENALITE

Fabre Minerals

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.
 

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: MonoclinicSpace 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),
Click Here for Large Greenalite Structure Window Crystal Structure:

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Shirozu H , Bailey S W , American Mineralogist , 50 (1965) p.868-885, Chlorite polytypism: III. Crystal structure of an orthohexagonal iron chlorite

 

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 Diaphaniety: Diaphaniety: 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 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:

relectron=3.01 gm/cc
note: rGreenalite =3.08 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01768
Boson Index = 0.98232
Help on Photoelectric: Photoelectric:

PEGreenalite = 13.80 barns/electron
U=PEGreenalite x relectron= 41.59 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: 71.1.2b.4 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.1)with 1:1 layers
  (71.1.2b)Serpentine group (Lizardite subgroup)
 
71.1.2b.1 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
71.1.2b.2 Lizardite Mg3Si2O5(OH)4 P1 1
 
71.1.2b.3 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
71.1.2b.4 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
Help on  Strunz Class: Strunz Class: VIII/H.27-60 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
  VIII/H.27 - Serpentine group
 
VIII/H.27-10 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m
 
VIII/H.27-20 Lizardite Mg3Si2O5(OH)4 P1 1
 
VIII/H.27-30 Clinochrysotile Mg3Si2O5(OH)4 Cc, C 2/m Mono
 
VIII/H.27-40 Orthochrysotile Mg3Si2O5(OH)4 Unk Ortho
 
VIII/H.27-50 Parachrysotile Mg3Si2O5(OH)4 Unk Ortho
 
VIII/H.27-55 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
 
VIII/H.27-60 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
 
VIII/H.27-70 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
 
VIII/H.27-80 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
 
VIII/H.27-90 Zinalsite Zn2AlSi2O5(OH)4·2(H2O)(?) Mono
 
VIII/H.27-95 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m
 
VIII/H.27-100 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
 
VIII/H.27-110 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
 
VIII/H.27-120 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
 
VIII/H.27-140 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono
 
VIII/H.27-150 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
 
VIII/H.27-160 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m
 
VIII/H.27-170 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
 
VIII/H.27-180 Maufite (Mg,Ni)Al4Si3O13·4(H2O)(?) Mono ? Mono
 
VIII/H.27-190 Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m
 

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 - Minerals of Wisconsin 14 -QUT Mineral Atlas 15 -École des Mines de Paris

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Greenalite

(Fe++,Fe+++)2-3Si2O5(OH)4
Dana No: 71.1.2b.4 Strunz No: VIII/H.27-60
Locality:

 

Notes:

 

 
   
 
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