Mineralogy Database

Norbergite Mineral Data

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General Norbergite Information

Help on Chemical  Formula: Chemical Formula: Mg3(SiO4)(F,OH)2
Help on Composition: Composition: Molecular Weight = 202.00 gm
   Magnesium  36.10 %  Mg   59.86 % MgO
   Silicon    13.90 %  Si   29.74 % SiO2
   Hydrogen    0.25 %  H     2.23 % H2O
   Oxygen     35.64 %  O
   Fluorine   14.11 %  F    14.11 % F
                -   %   F    -5.94 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3(SiO4)F1.5(OH)0.5
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1926
Help on Locality: Locality: Ostanmosoa iron mine, Norberg, Vastmanland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Norbergite + Pronunciation Say NORBERGITE
Help on Synonym: Synonym: ICSD 15203
  PDF 11-686

Norbergite Image

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Comments: Numerous orange to orange-brown dipyramidal crystals of norbergite in white matrix.
Location: Piukkala, Near Pargas, Finland. Scale: 2.1 X 2.7 cm.
© John Veevaert

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Comments: Yellow orange norbergite inclustions in white marble (calcite)..
Location: Oakssaung Hill, Mogok, Mandalay Myanmar. Scale: Crystal size 5 mm.
© Fabre Minerals

Norbergite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.8553:1:2.1702
Help on Cell Dimensions: Cell Dimensions: a = 8.72, b = 4.7, c = 10.2, Z = 4; V = 418.04 Den(Calc)= 3.21
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.058(1), 2.23(0.8), 2.639(0.75),

Physical Properties of Norbergite

Help on Cleavage: Cleavage: {???} Distinct
Help on Color: Color: White, Yellow, Brown, Red.
Help on Density: Density: 3.1 - 3.2, Average = 3.15
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luminescence: Luminescence: Fluorescent, Short UV=bright yellow.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white

Optical Properties of Norbergite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.088 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1786,KPDmeas= 0.182,KC= 0.1958
Ncalc = 1.61 - 1.63
Help on Optical Data: Optical Data: Biaxial (+), a=1.563, b=1.567, g=1.59, bire=0.0270

Calculated Properties of Norbergite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.12 gm/cc
note: Specific Gravity of Norbergite =3.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PENorbergite = 1.41 barns/electron
U=PENorbergite x rElectron Density= 4.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Norbergite is Not Radioactive

Norbergite Classification

Help on  Dana Class: Dana Class: 52.03.02a.01 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.03)with cations in [6] coordination only
  (52.03.02a)Humite group
52.03.02a.01 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.AF.40 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AF -Nesosilicates with additional anions;
09.AF.40 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m

Other Norbergite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Norbergite :
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 - Franklin Minerals(Palache)
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
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

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Dana No: 52.03.02a.01 Strunz No: 09.AF.40





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