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Panethite Mineral Data

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General Panethite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca,K)2(Mg,Fe++,Mn)2(PO4)2
Help on Composition: Composition: Molecular Weight = 323.06 gm
   Potassium    2.42 %  K     2.92 % K2O
   Sodium       8.54 %  Na   11.51 % Na2O
   Calcium      7.44 %  Ca   10.41 % CaO
   Magnesium    9.03 %  Mg   14.97 % MgO
   Manganese    3.40 %  Mn    4.39 % MnO
   Iron        10.37 %  Fe   13.34 % FeO
   Phosphorus  19.18 %  P    43.94 % P2O5
   Oxygen      39.62 %  O
              ______        ______ 
              100.00 %      101.49 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.2Ca0.6K0.2Mg1.2Fe2+0.6Mn2+0.2(PO4)2
Help on Environment: Environment: Intersteller space.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Dayton meteorite, Montgomery County, Ohio, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Adolph Paneth (1887-1958), director of the Max-Planck Institute of Chemistry, Mainz, Germay.
Help on Name Pronunciation: Name Pronunciation: Panethite + Pronunciation Say PANETHITE

Panethite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6832:1:1.7362
Help on Cell Dimensions: Cell Dimensions: a = 10.18, b = 14.9, c = 25.87, Z = 22; beta = 91.1° V = 3,923.29 Den(Calc)= 3.01
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.007(1), 2.71(0.7), 5.1(0.6),

Physical Properties of Panethite

Help on Color: Color: Brownish yellow.
Help on Density: Density: 2.9 - 3, Average = 2.95
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Panethite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1907,KPDmeas= 0.1946,KC= 0.1935
Ncalc = 1.56 - 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.567, b=1.576, g=1.579, bire=0.0120, 2V(Calc)=58, 2V(Meas)=51.

Calculated Properties of Panethite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Panethite =2.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEPanethite = 6.36 barns/electron
U=PEPanethite x relectron= 18.35 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 34.14 (Gamma Ray American Petroleum Institute Units)
Concentration of Panethite per GRapi unit = 2.93 (%)

Estimated Radioactivity from Panethite - barely detectable


Panethite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.01)A+ B++ XO4
  (38.01.06)Dana Group Panethite (Na,Ca,K)2(Mg,Fe,Mn)2(PO4)2 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 08.AC.65 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.65 Panethite (Na,Ca,K)2(Mg,Fe,Mn)2(PO4)2 P 21/n 2/m

Other Panethite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Panethite :
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: 08.AC.65





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