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Luneburgite Mineral Data

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General Luneburgite Information

Help on Chemical  Formula: Chemical Formula: Mg3B2(PO4)2(OH)6•5(H2O)
Help on Composition: Composition: Molecular Weight = 476.60 gm
   Magnesium   15.30 %  Mg   25.37 % MgO
   Boron        4.54 %  B    14.61 % B2O3
   Phosphorus  13.00 %  P    29.78 % P2O5
   Hydrogen     3.38 %  H    30.24 % H2O
   Oxygen      63.78 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3B2(PO4)2(OH)6•5(H2O)
Help on Environment: Environment: In marine evaporite sequences.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1870
Help on Locality: Locality: Liineburg, 40 km south-southeast of Hannover, Lower Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Luneburgite + Pronunciation Say LUNEBURGITE
Help on Synonym: Synonym: Lueneburgite

Luneburgite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6475:1:0.6424
Help on Cell Dimensions: Cell Dimensions: a = 6.3475, b = 9.8027, c = 6.2976, Z = 1; alpha = 84.86°, beta = 106.4°, gamma = 96.4° V = 372.07 Den(Calc)= 2.13
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

Physical Properties of Luneburgite

Help on Color: Color: White, Brownish white, Green, Colorless.
Help on Density: Density: 2.05
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Luneburgite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.092 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2528,KPDmeas= 0.2615,KC= 0.2395
Ncalc = 1.49 - 1.51
Help on Optical Data: Optical Data: Biaxial (-), a=1.52-1.522, b=1.54-1.541, g=1.545-1.548, bire=0.0250-0.0260, 2V(Calc)=52-60, 2V(Meas)=63.

Calculated Properties of Luneburgite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.17 gm/cc
note: Specific Gravity of Luneburgite =2.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PELuneburgite = 1.09 barns/electron
U=PELuneburgite x rElectron Density= 2.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Luneburgite is Not Radioactive

Luneburgite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.11)Dana Group Luneburgite Mg3B2(PO4)2(OH)6•5(H2O) P1 1
Help on  Strunz Class: Strunz Class: 06.AC.60 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
06.AC.60 Luneburgite Mg3B2(PO4)2(OH)6•5(H2O) P1 1

Other Luneburgite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Luneburgite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 06.AC.60