Mineralogy Database

Admontite Mineral Data

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General Admontite Information

Help on Chemical  Formula: Chemical Formula: MgB6O10•7(H2O)
Help on Composition: Composition: Molecular Weight = 375.27 gm
   Magnesium   6.48 %  Mg   10.74 % MgO
   Boron      17.28 %  B    55.66 % B2O3
   Hydrogen    3.76 %  H    33.60 % H2O
   Oxygen     72.48 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(B6O10)•7(H2O)
Help on Environment: Environment: In a gypsum deposit.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Austria, Schidmaur, near Admont Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Admont, Austria, near the original locality.
Help on Name Pronunciation: Name Pronunciation: Admontite + Pronunciation Say ADMONTITE
Help on Synonym: Synonym: ICSD 34190
  PDF 34-1438

Admontite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2591:1:1.1241
Help on Cell Dimensions: Cell Dimensions: a = 12.68, b = 10.07, c = 11.32, Z = 4; beta = 109.68° V = 1,360.99 Den(Calc)= 1.83
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.6(1), 2.68(0.9), 12.08(0.9),

Physical Properties of Admontite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 1.82 - 1.87, Average = 1.84
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Streak: Streak: white

Optical Properties of Admontite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2585,KPDmeas= 0.2564,KC= 0.2554
Ncalc = 1.46 - 1.48
Help on Optical Data: Optical Data: Biaxial (-), a=1.442, g=1.504, bire=0.0620
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Admontite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.89 gm/cc
note: Specific Gravity of Admontite =1.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEAdmontite = 0.45 barns/electron
U=PEAdmontite x rElectron Density= 0.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Admontite is Not Radioactive

Admontite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.06)Dana Type
  (26.06.03)Dana Group Admontite MgB6O10•7(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 06.FA.15 06 - BORATES
  06.F - Hexaborates
  06.FA -Neso-hexaborates
06.FA.15 Admontite MgB6O10•7(H2O) P 21/c 2/m

Other Admontite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Admontite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 06.FA.15





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