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Parwanite

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Big Photo

Parwan lava caves, Bacchus Marsh, Victoria, Australia
© Leon Hupperichs

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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
 
2
Al
 
9
[(P,S)O
 
4
]
 
8
(OH)
 
6
•28H
 
2
O
8.DO.20Perhamite
Ca
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
14.1
 · 8H
 
2
O
8.DO.20Krásnoite
Ca
 
3
Al
 
7.7
Si
 
3
P
 
4
O
 
23.5
(OH)
 
12.1
F
 
2
 · 8H
 
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
    Mineral and/or Locality
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