IMA2002-016 Mineral Data


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General IMA2002-016 Information
Help on Chemical Formula: Chemical Formula: CaFe++Fe+++(Mn,Fe++)(Si2O7)O(OH)
Help on Composition: Composition: Molecular Weight = 408.11 gm
   Calcium     9.82 %  Ca   13.74 % CaO
   Manganese  10.10 %  Mn   13.04 % MnO
   Iron       30.79 %  Fe   22.01 % FeO / 19.56 % Fe2O3
   Silicon    13.76 %  Si   29.45 % SiO2
   Hydrogen    0.25 %  H     2.21 % H2O
   Oxygen     35.28 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaFe2+Fe3+Mn2+0.75Fe2+0.25(Si2O7)O(OH)
Help on Environment: Environment: Mn-dominant analogue of ilvaite.
Help on IMA Status: IMA Status: Proposed IMA 2002 (Dana # Added)
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals and Mineral Names (CNMMN)
 

IMA2002-016 Image

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IMA2002-016   Manganilvaite

Comments: Small, black, very bright crystals of manganilvaite on a matrix of clear quartz, white calcite, and tiny brassy pyrite crystals.
Location: Daye mining area, Hubei, China. Scale: 6 x 5.6 x 3.7 cm.
© Fabre Minerals

IMA2002-016 Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.4715:1:0.6607
Help on Cell Dimensions: Cell Dimensions: a = 13.0246, b = 8.8511, c = 5.8485, Z = 4; beta = 90.17° V = 674.22 Den(Calc)= 4.02
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.718(1), 2.848(0.9), 2.875(0.85),2.687(0.7), 1.475(0.48), 2.18(0.48), 2.111(0.47),
 

Physical Properties of IMA2002-016

Help on Color: Color: Black.
Help on Diaphaniety: Diaphaniety: Opaque
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of IMA2002-016

Help on RL Anisotrophism: RL Anisotrophism: Strong in blue-grayish.
Help on RL Color: RL Color: Gray to bluish gray with red internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of IMA2002-016 in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 460 nm    8.30   10.00 
   
 540 nm    7.50    9.80 
 580 nm    7.00    9.70 
 640 nm    6.10    9.50 
Calculated Relative Intensity Colors of IMA2002-016 in Air
Relative
Intensity		    0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%
R1                      
R2                      
 

Calculated Properties of IMA2002-016

Help on Electron Density: Electron Density:

relectron=3.91 gm/cc
note: rIMA2002-016 =4.02 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01325
Boson Index = 0.98675
Help on Photoelectric: Photoelectric:

PEIMA2002-016 = 13.56 barns/electron
U=PEIMA2002-016 x relectron= 52.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

IMA2002-016 is Not Radioactive
 

IMA2002-016 Classification
Help on Dana Class: Dana Class: 56.2.3.6 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.2)with cations in [4] and/or >[4] coordination
  (56.2.3)Lawsonite - Ilvaite group
 
56.2.3.1 Lawsonite CaAl2Si2O7(OH)2·(H2O) Ccmm 2/m 2/m 2/m
 
56.2.3.2 Hennomartinite SrMn2Si2O7(OH)2·(H2O) C mcm 2/m 2/m 2/m
 
56.2.3.3 Ilvaite CaFe2FeSi2O7O(OH) Pbnm 2/m 2/m 2/m
 
56.2.3.4 Noelbensonite! BaMn2(Si2O7)(OH)2·(H2O) C mcm 2/m 2/m 2/m
 
56.2.3.5 Itoigawaite! SrAl2Si2O7(OH)2·(H2O) C mcm 2/m 2/m 2/m
 
56.2.3.6 IMA2002-016 ! CaFeFe(Mn,Fe)(Si2O7)O(OH) P 21/a 2/m
Help on Strunz Class: Strunz Class: VIII/CX.00-00 VIII - Silicates
  VIII/CX - Unclassified Strunz Sorosilicates
  VIII/CX.00 - Lawsonite Group
 

Other IMA2002-016 Information
Help on See Also: See Also: Links to other databases for IMA2002-016 :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch)

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Print or Cut-and-Paste your IMA2002-016 Specimen Label here :

IMA2002-016

CaFe++Fe+++(Mn,Fe++)(Si2O7)O(OH)
Dana No: 56.2.3.6 Strunz No: VIII/CX.00-00
Locality:

 

Notes:

 
 
   
 
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