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Kosnarite (Kosnarita)

Pictures (2 Images total)

Kosnarit
Views (File:
1216802718
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Kosnarit
Fo.:Brasilien, Minas Gerais, Aracuai, Jenipapo, gelber blockiger Kristall BB: 12,0mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: B000909, Donator: Ricardo Scholz
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Jequitinhonha, Fluss/Itinga/Jenipapo District
Mineral: Kosnarite
Image: 1216802718
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
Kosnarit (SNr: B000909)

Fo.:Brasilien, Minas Gerais, Aracuai, Jenipapo, gelber blockiger Kristall BB: 12,0mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2008-07-23
Locality: Jenipapo District / Itinga / Jequitinhonha, Fluss / Minas Gerais / Südosten (Região Sudeste) / Brasilien
gelbe Kosnarit xx
Views (File:
1132156305
): 1056
gelbe Kosnarit xx
Größe: bis 1,5mm; Fundort: Itinga Mine, Minas Gerais, Brasilien
Copyright: John Veevaert; Contribution: slugslayer
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Jequitinhonha, Fluss/Itinga
Mineral: Kosnarite
Image: 1132156305
Rating: 5 (votes: 3)
License: Usage for Mineralienatlas project only
gelbe Kosnarit xx

Größe: bis 1,5mm; Fundort: Itinga Mine, Minas Gerais, Brasilien

Copyright: John Veevaert
Contribution: slugslayer 2005-11-16
Locality: Itinga / Jequitinhonha, Fluss / Minas Gerais / Südosten (Região Sudeste) / Brasilien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color farblos, graublau, hellgrün, gelb
Streak color weiß
Hardness (Mohs) 4.5
Cleavages vollkommen {102}
Fracture muschelig
Crystal System hexagonal, R3c

Chemism

Chemical formula

KZr24+[PO4]3

Chemical composition

Zirconium, Kalium, Phosphor, Sauerstoff

Unit weight: 506.4611536 u; Number of atoms in the formula: 18

Info

Empirical formula:

KZr2[PO4]3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

37.91

12

66.67

15.9994300

191.9931600

Phosphorus

P

18.35

3

16.67

30.9737612

92.9212836

Potassium

K

7.72

1

5.56

39.0983100

39.0983100

Zirconium

Zr

36.02

2

11.11

91.2242000

182.4484000

Analysis wt%

ZrO2 : 44.50, HfO2 : 0.50, MnO : 1.00, Na2O : 1.40, K2O : 8.70, F : 0.85, P2O5 : 43.30 (Ref: Rivista Mineralogica Italiana 93)

Strunz 9th edition incl. updates

8.AC.60

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
C: Mit mittelgroßen und großen [Kationen]
60:Kosnarit-Gruppe

Lapis Classification

VII/A.17-010

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen

Classification by Hölzel

8.AC.400

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
C: Phosphates, C medium + large
4: Kosnarite-Group

Dana 8th edition

38.04.12.01

38: Anhydrous Phosphates, etc
04: Anhydrous Phosphates, etc A+ XO4

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, graublau, hellgrün, gelb

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.026

Birefringence chart\! Kosnarite title=Birefringence chart Kosnarite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.656

RI value γ / ε

1.682

Ri mean

1.665

2V angle

Uniaxial (+)

Crystallography

Crystal System

hexagonal

Class (H-M)

3m

Space Group number

167

Space Group

R3c

Cell parameters a (Å)

8.7205(1)

Cell parameters b (Å)

-

Cell parameters c (Å)

23.9436(3)

Cell parameters a/b or c/a

2.746

Cell parameters c/b

-

Z

6

Volume (ų)

1576.895

Crystal structure

Paula C. Piilonen; Henrik Friis; Ralph Rowe; Glenn Poirier: Crystal structure determination of kosnarite, KZr2(PO4)3, from the Mario Pinto Mine, Jenipapo district, Itinga, Brazil. The Canadian Mineralogist Vol. 58, Nr. 5 (2020) S. 637-652.

X-Ray Powder Diffraction

6.41(50),
4.679(50),
4.329(100),
3.806(90),
3.167(40),
2.928(90),
2.502(50),
1.903(40)

XRD chart Kosnarite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.194

3.2 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {102}

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

USA/Maine/Oxford Co./Paris/Mt. Mica Quarry

Preface

Name from

Richard Kosnar (1946-2006), Mineralienhändler aus Colorado

Author (Name, Year)

Brownfield & Foord & Sutley & Botinelly, 1993

References

American Mineralogist 78 (1993), 653

Other languages

German

Kosnarit

Spanish

Kosnarita

French

Kosnarite

English

Kosnarite

Russian

Коснарит

CNMNC (IMA)-Number

IMA 1991-022

CNMNC symbol

Symbol

Ksn

Locations with GPS information

IDs

GUSID (Global unique identifier short form) MSvU-U1l1UC59zqNSxFEIQ
GUID (Global unique identifier) F9D42B31-654D-40D5-B9F7-3A8D4B114421
Database ID 2040