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Ericssonite Mineral Data

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General Ericssonite Information

Help on Chemical  Formula: Chemical Formula: BaMn++2Fe+++O[Si2O7](OH)
Help on Composition: Composition: Molecular Weight = 504.22 gm
   Barium     27.24 %  Ba   30.41 % BaO
   Manganese  21.79 %  Mn   28.14 % MnO
   Iron       11.08 %  Fe   15.84 % Fe2O3
   Silicon    11.14 %  Si   23.83 % SiO2
   Hydrogen    0.20 %  H     1.79 % H2O
   Oxygen     28.56 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaMn2+2Fe3+Si2O8(OH)
Help on Environment: Environment: Intergrown with orthoericssonite in a schefferite-rhodonite-tephroite skarn.
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Langban mine, near Filipstad, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John E. Ericsson (1803-1883), Swedish-born American engineer and inventor, designer of the iron-clad ship Monitor.
Help on Name Pronunciation: Name Pronunciation: Ericssonite + Pronunciation Say ERICSSONITE
 

Ericssonite Image

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  Ericssonite   Orthoericssonite   Tephroite

Comments: Dark brown ericssonite, intergrown with orthoericssonite, with pink rhodonite, light brown diopside (var. schefferite) and gray tephroite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ericssonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.9103:1:0.7596
Help on Cell Dimensions: Cell Dimensions: a = 20.46, b = 7.03, c = 5.34, Z = 4; beta = 95.5° V = 764.54 Den(Calc)= 4.38
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.51(1), 2.687(0.7), 2.78(0.6),
 

Physical Properties of Ericssonite

Help on Cleavage: Cleavage: {100} Perfect, {011} Distinct
Help on Color: Color: Reddish black.
Help on Density: Density: 4.21
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Sub Metallic
Help on Magnetism: Magnetism: Weakly magnetic
Help on Streak: Streak: brown
 

Optical Properties of Ericssonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1926,KPDmeas= 0.2004,KC= 0.1999
Ncalc = 1.84 - 1.88
Help on Optical Data: Optical Data: Biaxial (+), a=1.802-1.807, b=1.833-1.84, g=1.888-1.891, bire=0.0840-0.0860, 2V(Calc)=76-80, 2V(Meas)=30.
Help on Pleochroism (x): Pleochroism (x): pale greenish tan or yellow brown.
Help on Pleochroism (y): Pleochroism (y): reddish brown or reddish brown.
Help on Pleochroism (z): Pleochroism (z): deep brown or deep brown.
 

Calculated Properties of Ericssonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Ericssonite =4.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEEricssonite = 127.88 barns/electron
U=PEEricssonite x rElectron Density= 497.58 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ericssonite is Not Radioactive
 

Ericssonite Classification

Help on  Dana Class: Dana Class: 56.02.06c.03 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.06c)Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)
 
56.02.06c.01 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m
 
56.02.06c.02 Delindeite Ba2(Na,K,[])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2 A2/m 2/m
 
56.02.06c.03 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m
 
56.02.06c.04 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m
 
56.02.06c.05 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m
 
56.02.06c.06 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 21/c 2/m
 
56.02.06c.07 Eveslogite! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m
 
56.02.06c.08 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BE.25 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.25 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m
 
09.BE.25 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m
 
09.BE.25 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m
 
09.BE.25 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m
 
09.BE.25 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m
 
09.BE.25 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m
 
09.BE.25 Grenmarite! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m
 

Other Ericssonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ericssonite :
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 Ericssonite Specimen Label here :

Ericssonite

BaMn++2Fe+++O[Si2O7](OH)
Dana No: 56.02.06c.03 Strunz No: 09.BE.25
Locality:

 

Notes:

 

 
   
 


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