Panethite Mineral Data

General Panethite Information

Chemical Formula:

(Na,Ca,K)2(Mg,Fe++,Mn)2(PO4)2

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

Empirical Formula:

Na_1.2Ca_0.6K_0.2Mg_1.2Fe²⁺_0.6Mn²⁺_0.2(PO₄)₂

Environment:

Intersteller space.

IMA Status:

Approved IMA 1967

Locality:

Dayton meteorite, Montgomery County, Ohio, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Friedrich Adolph Paneth (1887-1958), director of the Max-Planck Institute of Chemistry, Mainz, Germay.

Name Pronunciation:

Panethite + Pronunciation

Search for Panethite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Panethite Crystallography

Axial Ratios:

a:b:c =0.6832:1:1.7362

Cell Dimensions:

a = 10.18, b = 14.9, c = 25.87, Z = 22; beta = 91.1° V = 3,923.29 Den(Calc)= 3.01

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.007(1), 2.71(0.7), 5.1(0.6),

Physical Properties of Panethite

Color:

Brownish yellow.

Density:

2.9 - 3, Average = 2.95

Diaphaneity:

Transparent

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Luster:

Vitreous (Glassy)

Optical Properties of Panethite

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

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

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Panethite =2.95 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Panethite= 6.36 barns/electron
U=PE_Panethite x r_electron= 18.35 barns/cc.

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

Dana Class:

38.01.06.01 (38)Anhydrous Phosphates, etc

(38.01)A+ B++ XO4

(38.01.06)Dana Group

38.01.06.01 Panethite (Na,Ca,K)2(Mg,Fe,Mn)2(PO4)2 P 2₁/n 2/m

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

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Search for Panethite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Panethite :

A Bijoux Google Search for Panethite
Adam's Minerals Google Search for Panethite
Cape Minerals Google Search for Panethite
Dakota Matrix Minerals Google Search for Panethite
Excalibur Mineral Corp. Google Search for Panethite
Exceptional Minerals Google Search for Panethite
John Betts Fine Minerals Search for Panethite
McDougall Minerals Google Search for Panethite
Mineral News Website Link
Rock and Mineral Shows Google Search for Panethite
Weinrich Minerals, Inc. Google Search for Panethite

Ask about Panethite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Panethite Specimen Label here :

Panethite

(Na,Ca,K)2(Mg,Fe++,Mn)2(PO4)2
Dana No: 38.01.06.01 Strunz No: 08.AC.65
Locality:

Notes: