Groutite Mineral Data + Say GROUTITE


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General Groutite Information
Help on Chemical Formula: Chemical Formula: Mn+++O(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: A secondary mineral lining vugs in weathered banded iron formations. Trimorphous with manganite and feitknechtite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1945
Help on Locality: Locality: Mahnomen mine, Cuyuna Range, Crow Wing Co., Minnesota, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frank Fitch Grout (1880-1958), petrologist, of the University of Minnesota, Minneapolis, Minnesota, USA.
Help on Synonym: Synonym: ICSD 30659
  PDF 24-713
 

Groutite Image

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Groutite

Comments: Prismatic crystals of groutite in white marble.
Location: Talcville, Saint Lawrence County, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Groutite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4261:1:0.2663
Help on Cell Dimensions: Cell Dimensions: a = 4.56, b = 10.7, c = 2.85, Z = 4; V = 139.06 Den(Calc)= 4.20
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.2(1), 2.67(0.7), 2.81(0.7),
Click Here for Large Groutite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Wyckoff R W G , Crystal Structures , 1 (1963) p.290-295, Second edition. Interscience Publishers, New York, New York

View Additional jPOWD Structure files for Groutite
[1]
 

Physical Properties of Groutite

Help on Cleavage: Cleavage: [010] Perfect, [100] Distinct
Help on Color: Color: Blue black.
Help on Density: Density: 4.144
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: dark brown
 

Optical Properties of Groutite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 2.28 - from Gladstone-Dale relationship (KC = 0.305) where Ncalc=Dcalc*KC+1
NCalc= 2.26 - from Gladstone-Dale relationship (KC = 0.305) where Ncalc=Dmeas*KC+1
Help on Pleochroism (x): Pleochroism (x): very dark brown or black.
Help on Pleochroism (y): Pleochroism (y): yellowish brown or yellowish brown.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Groutite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   13.70   22.00 
   
 420 nm   13.40   21.30 
 440 nm   13.30   20.70 
 460 nm   13.10   20.20 
 480 nm   13.00   19.70 
 500 nm   13.00   19.40 
 520 nm   12.90   19.10 
 540 nm   12.90   19.00 
 560 nm   12.80   19.00 
 580 nm   12.70   18.70 
 600 nm   12.70   18.60 
 620 nm   12.70   18.50 
 640 nm   12.60   18.30 
 660 nm   12.50   18.20 
 680 nm   12.40   18.00 
 700 nm   12.40   17.90 
Calculated Relative Intensity Colors of Groutite in Air
Relative
Intensity		    0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 690%
R1                        
R2                        
 

Calculated Properties of Groutite

Help on Electron Density: Electron Density:

relectron=4.01 gm/cc
note: rGroutite =4.20 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00017
Boson Index = 0.99983
Help on Photoelectric: Photoelectric:

PEGroutite = 16.21 barns/electron
U=PEGroutite x relectron= 65.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Groutite is Not Radioactive
 

Groutite Classification
Help on Dana Class: Dana Class: 6.1.1.3 (6)Hydroxides and Oxides Containing Hydroxyl
  (6.1)where X+++O OH
  (6.1.1)Diaspore group (Orthorhombic, Pnma or Pnmd)
 
6.1.1.1 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m
 
6.1.1.2 Goethite FeO(OH) Pbnm 2/m 2/m 2/m
 
6.1.1.3 Groutite MnO(OH) Pbnm 2/m 2/m 2/m
 
6.1.1.4 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m
 
6.1.1.5 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m
 
6.1.1.6 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: IV/F.06-80 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 Groutite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Groutite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 - Franklin Minerals(Dunn) 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris

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Groutite

Mn+++O(OH)
Dana No: 6.1.1.3 Strunz No: IV/F.06-80
Locality:

 

Notes:

 
 
   
 
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