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Schertelite Mineral Data

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General Schertelite Information

Help on Chemical  Formula: Chemical Formula: (NH4)2MgH2(PO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 324.40 gm
   Magnesium    7.49 %  Mg   12.42 % MgO
   Phosphorus  19.10 %  P    43.76 % P2O5
   Hydrogen     2.49 %  H      -   % Calc as (NH4)2O
   Hydrogen     3.11 %  H    27.77 % H2O
   Nitrogen     8.64 %  N    16.05 % (NH4)2O
   Oxygen      59.18 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)2MgH2(PO4)2•4(H2O)
Help on Environment: Environment: Formed in drier portions of bat guano, by the reaction of NH4 from guano with Mg in surrounding rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1902
Help on Locality: Locality: Skipton lava tube caves, 40 km southwest of Ballarat, Victoria, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Arnulf Schertel (1841-1902), mineralogist, Freiberg Mining Academy, Freiberg, Germany.
Help on Name Pronunciation: Name Pronunciation: Schertelite + Pronunciation Say SCHERTELITE
Help on Synonym: Synonym: ICSD 2733
  PDF 16-353

Schertelite Image

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Comments: Transparent glassy crystalline schertelite grains.
Location: Skipton Caves, Ballarat, Victoria, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Schertelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4853:1:0.3647
Help on Cell Dimensions: Cell Dimensions: a = 11.47, b = 23.63, c = 8.62, Z = 8; V = 2,336.33 Den(Calc)= 1.84
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.94(1), 2.97(0.43), 5.21(0.37),

Physical Properties of Schertelite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 1.83
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Schertelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.413 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.405 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2801,KPDmeas= 0.2816,KC= 0.1993
Ncalc = 1.36 - 1.37
Help on Optical Data: Optical Data: Biaxial (+), a=1.508, b=1.515, g=1.523, bire=0.0150, 2V(Calc)=88, 2V(Meas)=90.

Calculated Properties of Schertelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.93 gm/cc
note: Specific Gravity of Schertelite =1.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PESchertelite = 1.17 barns/electron
U=PESchertelite x rElectron Density= 2.25 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schertelite is Not Radioactive

Schertelite Classification

Help on  Dana Class: Dana Class: (39)Hydrated Acid Phosphates, etc
  (39.03)with miscellaneous formulae
  (39.03.02)Dana Group Schertelite (NH4)2MgH2(PO4)2•4(H2O) P bca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CH.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CH -With large and medium-sized cations, RO4:H2O < 1:1
08.CH.30 Schertelite (NH4)2MgH2(PO4)2•4(H2O) P bca 2/m 2/m 2/m

Other Schertelite 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 Schertelite :
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: 08.CH.30





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