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Berthierine Mineral Data

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General Berthierine Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Fe+++,Al,Mg)2-3(Si,Al)2O5(OH)4
Help on Composition: Composition: Molecular Weight = 295.97 gm
   Magnesium   1.64 %  Mg    2.72 % MgO
   Aluminum   17.32 %  Al   32.73 % Al2O3
   Iron       32.08 %  Fe   36.41 % FeO /  5.40 % Fe2O3
   Silicon    10.44 %  Si   22.33 % SiO2
   Hydrogen    0.68 %  H     6.09 % H2O
   Oxygen     37.84 %  O
             ______        ______ 
             100.00 %      105.68 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+1.5AlFe3+0.2Mg0.2Si1.1Al0.9O5(OH)2
Help on Environment: Environment: Common in unmetamorphosed marine sediments, in lateritic and polar soils.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Hayage, Meurthe-et-Moselle, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Pierre Berthier (1782-1861), French geologist.
Help on Name Pronunciation: Name Pronunciation: Berthierine + Pronunciation Say BERTHIERINE
 

Berthierine Image

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  Berthierine

Comments: Berthierine-1M, black pseudomorphs after cordylite-(Ce) crystals.
Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Berthierine Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.576:1:0.7717
Help on Cell Dimensions: Cell Dimensions: a = 5.3, b = 9.2, c = 7.1, Z = 2; beta = 104.5° V = 335.17 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.12(1), 3.546(1), 2.52(1),1.56(0.7), 2.147(0.7), 1.478(0.6), 1.775(0.6),
 

Physical Properties of Berthierine

Help on Color: Color: Brown green, Green yellow, Dark green.
Help on Density: Density: 3.03
Help on Diaphaneity: Diaphaneity: Translucent
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: Pearly
Help on Streak: Streak: greenish white
 

Optical Properties of Berthierine

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2167,KPDmeas= 0.2096,KC= 0.2258
Ncalc = 1.66 - 1.68
Help on Optical Data: Optical Data: Biaxial (?), a=1.62, g=1.65, bire=0.0300
 

Calculated Properties of Berthierine

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Berthierine =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBerthierine = 10.48 barns/electron
U=PEBerthierine x rElectron Density= 30.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Berthierine is Not Radioactive
 

Berthierine Classification

Help on  Dana Class: Dana Class: 71.01.02c.02 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.02c)Serpentine group (Amesite subgroup)
 
71.01.02c.01 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
 
71.01.02c.02 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
 
71.01.02c.03 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
 
71.01.02c.04 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
 
71.01.02c.05 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
 
71.01.02c.06 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
 
71.01.02c.07 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
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 Berthierine Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Berthierine :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
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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Berthierine

(Fe++,Fe+++,Al,Mg)2-3(Si,Al)2O5(OH)4
Dana No: 71.01.02c.02 Strunz No: 09.ED.15
Locality:

 

Notes:

 

 
   
 


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