Kosnarite Mineral Data

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General Kosnarite Information

Chemical Formula:

KZr++++2(PO4)3

Composition:

Molecular Weight = 506.46 gm

Potassium 7.72 % K 9.30 % K₂O

Zirconium 36.02 % Zr 48.66 % ZrO₂

Phosphorus 18.35 % P 42.04 % P₂O₅

Oxygen 37.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KZr₂(PO₄)₃

IMA Status:

Approved IMA 1993

Locality:

Mt Mica pegmatite, Paris, Oxford Co., Maine, USA Link to MinDat.org Location Data.

Name Origin:

Named for Richard A. Kosnar (1946-), mineral dealer.

Name Pronunciation:

Kosnarite + Pronunciation

Synonym:

ICSD 4427

IMA1991-022

PDF 46-1397

Kosnarite Image

Images:

Kosnarite

Comments: Pale bluish crystals of kosnarite in matrix.
Location: Mt Mica mine, Paris, Oxford Co., Maine, USA. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Kosnarite

Comments: Transparent crystals of kosnarite on matrix.
Location: Itinga Mine, Minas Gerais, Brazil. Scale: Crystal size 2 mm.
© John Veevaert

Images:

Kosnarite Zanazziite

Comments: Beige crystals of kosnarite with pinkish, radial aggregates of zanazziite on whte albite matrix.
Location: Jenipapo, Itinga, Minas Gerais, Brazil. Scale: Picture size 6 cm.
© Fabre Minerals

Kosnarite Crystallography

Axial Ratios:

a:c = 1:2.74858

Cell Dimensions:

a = 8.687, c = 23.877, Z = 6; V = 1,560.45 Den(Calc)= 3.23

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3c

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

By Intensity(I/I_o): 4.329(1), 2.928(0.9), 3.806(0.9),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Sljukic M , Matkovic B , Prodic B , Anderson D , Zeitschrift fur Kristallographie , 130 (1969) p.148-161, The crystal structure of KZr2(PO4)3, Locality: synthetic

Physical Properties of Kosnarite

Cleavage:

{102} Perfect

Color:

Colorless, Gray blue, Light green.

Density:

3.194

Diaphaneity:

Transparent

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kosnarite

Gladstone-Dale:

CI meas= -0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.047 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.2095,KC= 0.1978
Ncalc = 1.63 - 1.64

Optical Data:

Uniaxial (+), w=1.656, e=1.682, bire=0.0260.

Calculated Properties of Kosnarite

Electron Density:

Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Kosnarite =3.23 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Kosnarite= 50.56 barns/electron
U=PE_Kosnarite x r_electron= 154.76 barns/cc.

Radioactivity:

GRapi = 105.56 (Gamma Ray American Petroleum Institute Units)
Concentration of Kosnarite per GRapi unit = 0.95 (%)

Estimated Radioactivity from Kosnarite - barely detectable

Kosnarite Classification

Dana Class:

38.04.12.01 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.12)Dana Group

38.04.12.01 Kosnarite KZr2(PO4)3 R 3c 3 2/m

Strunz Class:

08.AC.60 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.60 Kosnarite KZr2(PO4)3 R 3c 3 2/m

Other Kosnarite Information

References:

PHYS. PROP.(Am.Min.,Vol.78,p653-656,1993) OPTIC PROP.(Am.Min.,Vol.78,p653-656,1993)

See Also:

Links to other databases for Kosnarite :
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
15 - WWW-MINCRYST

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Ask about Kosnarite 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 Kosnarite Specimen Label here :

Kosnarite

KZr++++2(PO4)3
Dana No: 38.04.12.01 Strunz No: 08.AC.60
Locality:

Notes: