Manganite Mineral Data

Manganite Mineral Data
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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 Name Pronunciation: Name Pronunciation: Manganite + Pronunciation Say MANGANITE
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 Diaphaneity: Diaphaneity: 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: Non-fluorescent.
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
Ncalc = 2.31 - 2.34
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: Bulk Density (Electron Density)=4.15 gm/cc
note: Specific Gravity of Manganite =4.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001763676
Boson Index = 0.9998236324
Help on Photoelectric: Photoelectric: PEManganite = 16.21 barns/electron
U=PEManganite x rElectron Density= 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: 06.01.03.01 (06)Hydroxides and Oxides Containing Hydroxyl
  (06.01)where X+++O OH
  (06.01.03)Dana Group
 
06.01.03.01 Manganite MnO(OH) B21/d 2/m
Help on Strunz Class: Strunz Class: 04.FD.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FD -Hydroxides with OH, without H2O; chains of edge-sharing octahedra
 
04.FD.15 Manganite MnO(OH) B21/d 2/m
 

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 - Athena
4 - CalTech Mineral Spectroscopy
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Franklin Minerals(Dunn)
8 - Franklin Minerals(Palache)
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Scandinavian mineral gallery

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Print or Cut-and-Paste your Manganite Specimen Label here :

Manganite

MnO(OH)
Dana No: 06.01.03.01 Strunz No: 04.FD.15
Locality:

 

Notes: