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Parwanite

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Big Photo

Parwan lava caves, Bacchus Marsh, Victoria, Australia
© viccloete

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Formula:
(Na,K)(Mg,Ca)
 
4
Al
 
8
(PO
 
4
)
 
8
(CO
 
3
)(OH)
 
7
 · 30H
 
2
O
System:Monoclinic
Name:Named after the type locality.


A complex cave mineral.

Classification of Parwanite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:8.DO.40

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
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Type Occurrence of Parwanite

Type Locality:Parwan lava caves, Bacchus Marsh, Victoria, Australia

Crystallography of Parwanite

Crystal System:Monoclinic
Class (H-M):2 - Sphenoidal
Space Group:P2 {P1 1 2} {P2} {P1 2 1}
Cell Parameters:a = 26.148Å, b = 11.781Å, c = 20.494Å
β = 111.27°
Ratio:a:b:c = 2.22 : 1 : 1.74
Unit Cell Volume:V 5,883.12 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
12.202 (12)
10.538 (100)
10.031 (14)
9.570 (13)
9.360 (13)
8.937 (10)
8.718 (11)
4.878 (10)

Chemical Properties of Parwanite

Formula:
(Na,K)(Mg,Ca)
 
4
Al
 
8
(PO
 
4
)
 
8
(CO
 
3
)(OH)
 
7
 · 30H
 
2
O
All elements listed in formula:Al, C, Ca, H, K, Mg, Na, O, P

Relationship of Parwanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DO.05Girvasite
NaCa
 
2
Mg
 
3
(PO
 
4
)
 
2
(H
 
2
PO
 
4
)(CO
 
3
)(OH)
 
2
 · 4H
 
2
O
8.DO.10Voggite
Na
 
2
Zr(PO
 
4
)(CO
 
3
)(OH) · 2H
 
2
O
8.DO.15Peisleyite
Na
 
3
Al
 
16
(PO
 
4
)
 
10
(SO
 
4
)
 
2
(OH)
 
17
 · 20H
 
2
O
8.DO.20Perhamite
(Ca,Sr)
 
3
Al
 
7
(PO
 
4
)
 
4
(SiO
 
4
)
 
3
(OH)
 
3
 · 16.5H
 
2
O
8.DO.25Saryarkite-(Y)
Ca(Y,Th)Al
 
5
(SiO
 
4
)
 
2
(PO
 
4
,SO
 
4
)
 
2
(OH)
 
7
 · 6H
 
2
O
8.DO.30Micheelsenite
(Ca,Y)
 
3
Al(HPO
 
4
,CO
 
3
)(CO
 
3
)(OH)
 
6
 · 12H
 
2
O
8.DO.45Skorpionite
Ca
 
3
Zn
 
2
(PO
 
4
)
 
2
(CO
 
3
)(OH)
 
2
 · H
 
2
O

Other Names for Parwanite

Synonyms:
IMA 1986-036a
Other Languages:

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 Parwanite

Reference List:

- +
IMA website - Proposals approved in January 2007

Birch, W. & D. Henry: "Phosphate Minerals of Victoria", p.147 (1997) [contains a preliminary description]

Willian D. Birch, Stuart J. Mills, Karolina Schwendtner, Allan Pring, John A. Webb, Ralph Segnit and John A. Watts (2007): "Parwanite: a new hydrated Na-Mg-Al-phosphate from a lava cave at Parwan, Victoria, Australia". Australian Journal of Mineralogy, 13, 23-30.

Internet Links for Parwanite

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    • Localities for Parwanite

    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
      • Bacchus Marsh
    		IMA website - Proposals approved in January 2007
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 18:22:04
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