Mineralogy Database

Brucite Mineral Data

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General Brucite Information

Help on Chemical  Formula: Chemical Formula: Mg(OH)2
Help on Composition: Composition: Molecular Weight = 58.32 gm
   Magnesium  41.68 %  Mg   69.11 % MgO
   Hydrogen    3.46 %  H    30.89 % H2O
   Oxygen     54.87 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(OH)2
Help on Environment: Environment: It occurs in serpentine, in chlorite or dolomitic schists, or in crystalline limestones as an alteration product of periclase.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1824
Help on Locality: Locality: New Jersey, USA serpentine. Asbestos mines of Asbestos and Black Lake in Quebec, Canada. crystalline limestones at Crestmore, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American mineralogist, A. Bruce (1777-1818).
Help on Name Pronunciation: Name Pronunciation: Brucite Say BRUCITE
Help on Synonym: Synonym: ICSD 64722
  Nemalite
  PDF 7-239
 

Brucite Image

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  Brucite

Comments: Crystal cluster of brucite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 7 x 5 x 4 cm.
© John Veevaert

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  Brucite

Comments: Pearly white, pseudohexagonal crystals of brucite on matrix.
Location: Pilcante, Trentino, Italy. Scale: Crystal size 1.6 cm.
© Sandro Maggia/Minernet.it

Brucite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.51541
Help on Cell Dimensions: Cell Dimensions: a = 3.147, c = 4.769, Z = 1; V = 40.90 Den(Calc)= 2.37
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.365(1), 4.77(0.9), 1.794(0.55),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 0) ( 0 0 1)

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Physical Properties of Brucite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Blue, Gray, Gray blue, Yellow, White.
Help on Density: Density: 2.39 - 2.4, Average = 2.39
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Brucite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2405,KPDmeas= 0.238,KC= 0.2432
Ncalc = 1.58
Help on Optical Data: Optical Data: Uniaxial (+), w=1.56, e=1.58, bire=0.0200.
 

Calculated Properties of Brucite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.44 gm/cc
note: Specific Gravity of Brucite =2.37 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEBrucite = 1.01 barns/electron
U=PEBrucite x rElectron Density= 2.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brucite is Not Radioactive
 

Brucite Classification

Help on  Dana Class: Dana Class: 06.02.01.01 (06)Hydroxides and Oxides Containing Hydroxyl
  (06.02)where X++ (OH)2
  (06.02.01)Brucite group (Rhombohedral: P-3m1)
 
06.02.01.01 Brucite Mg(OH)2 P 3m1 3 2/m
 
06.02.01.02 Amakinite (Fe,Mg)(OH)2 P 3m1 3 2/m
 
06.02.01.03 Pyrochroite Mn(OH)2 P 3m1 3 2/m
 
06.02.01.04 Portlandite Ca(OH)2 P 3m1 3 2/m
 
06.02.01.05 Theophrastite Ni(OH)2 P 3m1 3 2/m
Help on  Strunz Class: Strunz Class: 04.FE.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FE -Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
 
04.FE.05 Amakinite (Fe,Mg)(OH)2 P 3m1 3 2/m
 
04.FE.05 Brucite Mg(OH)2 P 3m1 3 2/m
 
04.FE.05 Portlandite Ca(OH)2 P 3m1 3 2/m
 
04.FE.05 Pyrochroite Mn(OH)2 P 3m1 3 2/m
 
04.FE.05 Theophrastite Ni(OH)2 P 3m1 3 2/m
 
04.FE.05 Fougerite! (Fe,Mg)6Fe2(OH)18•4(H2O) R 3m 3 2/m
 

Other Brucite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Brucite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - University of Colorado - Mineral Structure Data
20 - WWW-MINCRYST

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

Brucite

Mg(OH)2
Dana No: 06.02.01.01 Strunz No: 04.FE.05
Locality:

 

Notes:

 

 
   
 


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