Groutite Mineral Data (original) (raw)

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 Name Pronunciation: Name Pronunciation:

Groutite Say GROUTITE

Help on Synonym: Synonym:

ICSD 30659

PDF 24-713

Groutite Image

Click Here for Larger Groutite Image in a New Browser Window Images:

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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| | 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 Diaphaneity: Diaphaneity:

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 R 2 ∑ 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

RelativeIntensity 0% 70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 690%
R1
R2

Calculated Properties of Groutite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=4.01 gm/cc
note: Specific Gravity of Groutite =4.20 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0001763676
Boson Index = 0.9998236324

Help on Photoelectric: Photoelectric:

PEGroutite = 16.21 barns/electron
U=PEGroutite x rElectron Density= 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:

06.01.01.03 (06)Hydroxides and Oxides Containing Hydroxyl

(06.01)where X+++O OH

(06.01.01)Diaspore group (Orthorhombic, Pnma or Pnmd)

06.01.01.01 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m

06.01.01.02 Goethite FeO(OH) Pbnm 2/m 2/m 2/m

06.01.01.03 Groutite MnO(OH) Pbnm 2/m 2/m 2/m

06.01.01.04 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m

06.01.01.05 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m

06.01.01.06 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m

Help on Strunz Class: Strunz Class:

04.FD.10 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.10 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m

04.FD.10 Diaspore AlO(OH) Pbnm 2/m 2/m 2/m

04.FD.10 Guyanaite CrO(OH) Pnnm 2/m 2/m 2/m

04.FD.10 Groutite MnO(OH) Pbnm 2/m 2/m 2/m

04.FD.10 Goethite FeO(OH) Pbnm 2/m 2/m 2/m

04.FD.10 Montroseite (V,Fe,V)O(OH) Pbnm 2/m 2/m 2/m

04.FD.10 Tsumgallite! GaO(OH) Pbnm 2/m 2/m 2/m

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 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Groutite

Mn+++O(OH)
Dana No: 06.01.01.03 Strunz No: 04.FD.10
Locality:

Notes: