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Kosnarite

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Big Photo

Mount Mica Quarry, Paris, Oxford Co., Maine, USA
© Van King

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Formula:
KZr
 
2
(PO
 
4
)
 
3
System:TrigonalColour:Pale blue to pale green ...
Hardness:4½
Name:For Richard Kosnar (1946-2006), Colorado mineral dealer
This page provides mineralogical data about Kosnarite.

Classification of Kosnarite

IMA status:Approved
Strunz 8th edition ID:7/A.17-10
Nickel-Strunz 10th (pending) edition ID:8.AC.60

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Dana 7th edition ID:38.1.9.1
Dana 8th edition ID:38.4.12.1

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
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Type Occurrence of Kosnarite

Co-type Localities:Mount Mica Quarry, Paris, Oxford Co., Maine, USA
Black Mountain Quarry (Black Mountain pegmatite), Rumford, Oxford Co., Maine, USA
Year of Discovery:1991

Occurrences of Kosnarite

Geological Setting:Late alteration mineral in granitic pegmatites

Physical Properties of Kosnarite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Pale blue to pale green to colourless.
Streak:White
Hardness (Mohs):4½
Tenacity:Brittle
Cleavage:Perfect
on {1012}
Fracture:Conchoidal
Density (measured):3.194(2) g/cm3
Density (calculated):3.206 g/cm3

Crystallography of Kosnarite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3c {R3 2/c}
Cell Parameters:a = 8.687(2) Å, c = 23.877(7) Å
Ratio:a:c = 1 : 2.749
Unit Cell Volume:V 1,560.45 ų (Calculated from Unit Cell)
Z:6
Morphology:Rhombohedral pseudocubic crystals

Optical Data of Kosnarite

Type:Uniaxial (+)
RI values: nω = 1.656 nε = 1.682
Maximum Birefringence:δ = 0.026

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Kosnarite

Formula:
KZr
 
2
(PO
 
4
)
 
3
Essential elements:K, O, P, Zr
All elements listed in formula:K, O, P, Zr
Common Impurities:Na,Rb,Mn,Hf,F

Relationship of Kosnarite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AC.05Howardevansite
NaCuFe
 
2
(VO
 
4
)
 
3
8.AC.10Alluaudite
(Na,Ca)Mn
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(PO
 
4
)
 
3
8.AC.10Arseniopleite
NaCaMn
2+
 
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
8.AC.10Caryinite
(Na,Pb)(Ca,Na)(Ca,Mn
2+
 
)(Mn
2+
 
,Mg,Fe
3+
 
)
 
2
(AsO
 
4
)
 
3
8.AC.10Ferroalluaudite
(Na,Ca)Fe
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)
 
3
8.AC.10Hagendorfite
NaCaMn
2+
 
Fe
2+
2
(PO
 
4
)
 
3
8.AC.10Johillerite
Na(Mg,Zn)
 
3
Cu(AsO
 
4
)
 
3
8.AC.10Maghagendorfite
(□,Na,)(Na,Ca,Fe
2+
 
)Mn(Mg,Fe
2+
 
,Fe
3+
 
)
 
3
(PO
 
4
)
 
3
8.AC.10Nickenichite
Na
 
0.8
Ca
 
0.4
Cu
 
0.4
(Mg,Fe)
 
3
(AsO
 
4
)
 
3
8.AC.10Varulite
NaCaMn
2+
 
Mn
2+
2
(PO
 
4
)
 
3
8.AC.10Ferrohagendorfite
NaCaFe
2+
 
Fe
2+
2
(PO
 
4
)
 
3
8.AC.10Bradaczekite
NaCu
 
4
(AsO
 
4
)
 
3
8.AC.10Yazganite
NaFe
3+
2
(Mg,Mn
2+
 
)(AsO
 
4
)
 
3
 · H
 
2
O
8.AC.10Groatite
NaCaMn
 
2
(PO
 
4
)(HPO
 
4
)
 
2
8.AC.15Bobfergusonite
Na
 
2
Mn
 
5
FeAl(PO
 
4
)
 
6
8.AC.15Ferrowyllieite
(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO
 
4
)
 
3
8.AC.15Qingheiite
NaMn
3+
 
Mg(Al,Fe
3+
 
)(PO
 
4
)
 
3
8.AC.15Rosemaryite
(Na,Ca,Mn)(Mn,Fe
2+
 
)(Fe
3+
 
,Mg)Al(PO
 
4
)
 
3
8.AC.15Wyllieite
(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO
 
4
)
 
3
8.AC.15Ferrorosemaryite
◻NaFe
2+
 
Fe
3+
 
Al(PO
 
4
)
 
3
8.AC.15Qingheiite-(Fe2+)
Na
 
2
Fe
2+
 
MgAl(PO
 
4
)
 
3
8.AC.18Manitobaite
Na
 
16
Mn
2+
 
 
25
Al
 
8
(PO
 
4
)
 
30
8.AC.20Marićite
NaFe
2+
 
(PO
 
4
)
8.AC.25Berzeliite
NaCa
 
2
(Mg,Mn
2+
 
)
 
2
(AsO
 
4
)
 
3
8.AC.25Manganberzeliite
(Ca,Na)
 
3
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
8.AC.25Palenzonaite
(Ca,Na)
 
3
CaMn
2+
2
(VO
 
4
)
 
3
8.AC.25Schäferite
Ca
 
2
NaMg
 
2
(VO
 
4
)
 
3
8.AC.30Brianite
Na
 
2
CaMg(PO
 
4
)
 
2
8.AC.35Vitusite-(Ce)
Na
 
3
(Ce,La,Nd)(PO
 
4
)
 
2
8.AC.40Olgite
(Sr,Ba)(Na,Sr,REE)
 
2
Na(PO
 
4
)
 
2
8.AC.40Bario-olgite
(Ba,Sr)(Na,Sr,REE)
 
2
Na(PO
 
4
)
 
2
 ·
8.AC.45Strontiowhitlockite
Sr
 
9
Mg(PO
 
4
)
 
6
(HPO
 
4
)
8.AC.45Whitlockite
Ca
 
9
Mg(PO
 
4
)
 
6
(HPO
 
4
)
8.AC.45Merrillite
Ca
 
9
NaMg(PO
 
4
)
 
7
8.AC.45Tuite
Ca
 
3
(PO
 
4
)
 
2
8.AC.45Ferromerrillite
Ca
 
9
NaFe
2+
 
(PO
 
4
)
 
7
8.AC.45Bobdownsite
Ca
 
9
Mg(PO
 
4
)
 
6
(PO
 
3
F)
8.AC.50Chladniite
{Ca}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mg,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Fillowite
{Mn
2+
 
}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mn
2+
 
,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Johnsomervilleite
{Ca}{Na
 
6
[ ]
 
2
}{Ca
 
6
Na
 
2
}{(Fe
2+
 
,Mg,Mn
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Galileiite
{Fe
2+
 
}{Na
 
8
}{Fe
2+
4
Na
 
4
}{Fe
2+
43
}(PO
 
4
)
 
36
8.AC.50Stornesite-(Y)
{(Y, Ca)}{Na
 
6
◻
 
2
}{(Ca,Na)
 
8
}{(Mg,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Xenophyllite
Na
 
4
Fe
2+
7
(PO
 
4
)
 
6
8.AC.55Harrisonite
Ca(Fe
2+
 
,Mg)
 
6
(PO
 
4
)
 
2
(SiO
 
4
)
 
2
8.AC.65Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
8.AC.70Stanfieldite
Ca
 
7
Ca
 
2
Mg
 
9
(PO
 
4
)
 
12
8.AC.75Ronneburgite
K
 
2
MnV
 
4
O
 
12
8.AC.80Tillmannsite
(Ag
 
3
Hg)(VO
 
4
,AsO
 
4
)
8.AC.85Filatovite
K(Al,Zn)
 
2
(As,Si)
 
2
O
 
8

Other Names for Kosnarite

Synonyms:
IMA1991-022
Other Languages:
German:Kosnarit
Russian:Коснарит
Spanish:Kosnarita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Kosnarite

Reference List:

- +
Sljukic, M., B. Matkovic, B. Prodic, and D. Anderson (1969): The crystal structure of KZr2(PO4)3. Z. Kristallogr., 130, 148–161.

Brownfield, M. E., Foord, E. E., Sutley, S. J. and Botinelly, T. (1993): Kosnarite, KZr2(PO4)3, a new mineral from Mount Mica and Black Mountain, Oxford County, Maine. Am. Mineral. 78, 653-656.

New Minerals (1997), New Minerals 1990-1994.

Internet Links for Kosnarite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Kosnarite details from Handbook of Mineralogy (PDF)
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    • Localities for Kosnarite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Victoria
      • Wycheproof
    		Birch,W.D.;et al., "Wycheproofite; a new hydrated sodium aluminium zirconium phosphate from Wycheproof, Victoria, Australia, and a new occurrence of kosnarite" ,Mineralogical Magazine. 58, 635-639(1994); R&M. 71:160-161 (1996)
    Brazil
     
    • Minas Gerais
      • Jequitinhonha valley
        • Itinga
    		Peter Haas, Elmar Lackner anf Jordi Fabre specimens.
    Simone Citon specimen
    USA
     
    • Maine
      • Oxford Co.
        • Paris
    		Brownfield, M. E., Foord, E. E., Sutley, S. J. and Botinelly, T. (1993): Kosnarite, KZr2(PO4)3, a new mineral from Mount Mica and Black Mountain, Oxford County, Maine. Am. Mineral. 78, 653-656.
        • Rumford
    		Brownfield, M. E., Foord, E. E., Sutley, S. J. and Botinelly, T. (1993): Kosnarite, KZr2(PO4)3, a new mineral from Mount Mica and Black Mountain, Oxford County, Maine. Am. Mineral. 78, 653-656.
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