Manganite Mineral Data + Say MANGANITE

General Manganite Information
Help on Chemical Formula: Chemical Formula: MnO(OH)
Help on Composition: Composition: Molecular Weight = 87.94 gm
   Manganese  62.47 %  Mn   89.76 % Mn2O3
   Hydrogen    1.15 %  H    10.24 % H2O
   Oxygen     36.39 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn3+O(OH)
Help on Environment: Environment: Formed in low-temperature hydrothermal or hot-spring manganese deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1827
Help on Locality: Locality: Ilfeld, Harz, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its chemical composition.
Help on Synonym: Synonym: Brown manganese ore
  ICSD 27456
  PDF 41-1379
 

Manganite Image

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Manganite

Comments: Lustrous feathery crystals of manganite to 0.75 cm.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 7.8 x 4.2 cm.
© John Veevaert
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Manganite   Sudoite

Comments: Pinkish to nearly white earthy sudoite with dark manganite.
Location: Ilfeld, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag
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Manganite   Vaterite   Defernite

Comments: Opaque white fibrous vaterite with red defernite and black manganite.
Location: Kombat Mine, Otavi, Otjozondjupa, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Manganite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.6931:1:1.0871
Help on Cell Dimensions: Cell Dimensions: a = 8.94, b = 5.28, c = 5.74, Z = 8; beta = 90° V = 270.95 Den(Calc)= 4.31
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: B21/d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.4(1), 2.64(0.6), 2.28(0.5),
Help on Forms: Forms:

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Forms: [ 8 1 0] [ 0 1 0] [ 2 1 0] [ 1 0 1] [ 1 1 1]

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Kohler T , Armbruster T , Libowitzky E , Journal of Solid State Chemistry , 133 (1997) p.486-500, Hydrogen bonding and Jahn-Teller distortion in groutite, alpha-MnOOH,, and manganite, gamma-MnOOH, and their relations to the manganese, dioxides ramsdellite and pyrolusite, Locality: Nchwaning Mine, Kalahari manganese field, Republic of South Africa, Note: Uiso corrected

 

Physical Properties of Manganite

Help on Cleavage: Cleavage: [010] Perfect
Help on Color: Color: Black, Gray, Grayish black.
Help on Density: Density: 4.3 - 4.4, Average = 4.34
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pseudo Orthorhombic - Crystals show an orthorhombic shape.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Sub Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: dark brown
 

Optical Properties of Manganite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3117,KPDmeas= 0.3088,KC= 0.305
Help on Optical Data: Optical Data: Biaxial (+), a=2.25, b=2.25, g=2.53, bire=0.2800
Help on Pleochroism (x): Pleochroism (x): faint reddish brown.
Help on Pleochroism (z): Pleochroism (z): faint red brown.
Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Bireflectance: RL Bireflectance: Distinct, in grays.
Help on RL Color: RL Color: Gray white with brownish tint with blood red internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Manganite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   18.00   25.10 
   
 420 nm   18.00   24.80 
 440 nm   18.00   24.50 
 460 nm   17.90   24.10 
 480 nm   17.80   23.70 
 500 nm   17.60   23.20 
 520 nm   17.30   22.70 
 540 nm   17.00   22.20 
 560 nm   16.80   21.60 
 580 nm   16.50   21.20 
 600 nm   16.30   20.80 
 620 nm   16.10   20.60 
 640 nm   16.00   20.30 
 660 nm   15.80   20.10 
 680 nm   15.70   19.90 
 700 nm   15.70   19.70 
Calculated Relative Intensity Colors of Manganite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540%
R1                      
R2                      
 

Calculated Properties of Manganite

Help on Electron Density: Electron Density:

relectron=4.15 gm/cc
note: rManganite =4.35 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00017
Boson Index = 0.99983
Help on Photoelectric: Photoelectric:

PEManganite = 16.21 barns/electron
U=PEManganite x relectron= 67.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganite is Not Radioactive
 

Manganite Classification
Help on Dana Class: Dana Class: 6.1.3.1 (6)Hydroxides and Oxides Containing Hydroxyl
  (6.1)where X+++O OH
  (6.1.3)Dana Group
 
6.1.3.1 Manganite MnO(OH) B21/d 2/m
Help on Strunz Class: Strunz Class: IV/F.06-70 IV - Oxides
  IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure
  IV/F.06 - Diaspore - Goethite - Faitknechtite series
 
IV/F.06-10 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m
 
IV/F.06-20 Boehmite AlO(OH) Amam 2/m 2/m 2/m
 
IV/F.06-25 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m
 
IV/F.06-30 Goethite FeO(OH) Pbnm 2/m 2/m 2/m
 
IV/F.06-40 Lepidocrocite FeO(OH) Amam 2/m 2/m 2/m
 
IV/F.06-50 Akaganeite Fe(O,OH,Cl) I2/m 2/m
 
IV/F.06-60 Feroxyhyte FeO(OH) Unk Hex
 
IV/F.06-70 Manganite MnO(OH) B21/d 2/m
 
IV/F.06-80 Groutite MnO(OH) Pbnm 2/m 2/m 2/m
 
IV/F.06-90 Feitknechtite beta-MnO(OH) Unk Hex
 

Other Manganite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Manganite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 - Franklin Minerals(Dunn) 9 - Franklin Minerals(Palache) 10 -Google Images 11 -Google Scholar 12 -Handbook of Mineralogy (UofA) 13 -MinDAT 14 -MinMax(Deutsch) 15 -MinMax(English) 16 -Mineralienatlas (Deutsch) 17 - Minerals of Wisconsin 18 -QUT Mineral Atlas 19 - Scandinavian mineral gallery 20 -École des Mines de Paris

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Manganite

MnO(OH)
Dana No: 6.1.3.1 Strunz No: IV/F.06-70
Locality:

 

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