Parwanite
A valid IMA mineral species
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About Parwanite
Formula:
(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7 · 30H2O
Colour:
White, cream
Lustre:
Pearly
Hardness:
1
Specific Gravity:
2.17
Crystal System:
Monoclinic
Name:
Named after the type locality.
A complex cave mineral.
Unique Identifiers
Mindat ID:
31409
Long-form identifier:
mindat:1:1:31409:7
Similar Names
| Paranite-(Y) | A synonym of Paraniite-(Y) |
| Parianite | A synonym of 'Bitumen' |
IMA Classification of Parwanite
Approved
IMA Formula:
NaMg4Al8(PO4)8(CO3)(OH)7·30H2O
Approval year:
2007
First published:
2007
Classification of Parwanite
8.DO.40
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Prw | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Parwanite
Pearly
Transparency:
Translucent
Colour:
White, cream
Streak:
White
Hardness:
1 on Mohs scale
Hardness Data:
Estimated
Cleavage:
None Observed
Density:
2.17(3) g/cm3 (Measured) 2.064 g/cm3 (Calculated)
Optical Data of Parwanite
Type:
Biaxial (+)
RI values:
nα = 1.493(3) nβ = 1.5 nγ = 1.508(3)
2V:
Calculated: 82.2°
Max. Birefringence:
δ = 0.015
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Chemistry of Parwanite
Mindat Formula:
(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7 · 30H2O
Element Weights:
Crystallography of Parwanite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P2
Cell Parameters:
a = 26.148 Å, b = 11.781 Å, c = 20.494 Å
β = 111.27°
β = 111.27°
Ratio:
a:b:c = 2.22 : 1 : 1.74
Unit Cell V:
5,883.12 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.202 Å | (12) |
| 10.538 Å | (100) |
| 10.031 Å | (14) |
| 9.570 Å | (13) |
| 9.360 Å | (13) |
| 8.937 Å | (10) |
| 8.718 Å | (11) |
| 4.878 Å | (10) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 52 : Guano- and urine-derived minerals | <0.4 |
Type Occurrence of Parwanite
General Appearance of Type Material:
Minute roseate clusters of very thin, platy pseudoexagonal crystals encrusting surfaces within taranakite-clay matrix. Clusters are 50-100 µm in diameter, the crystals about 2-5 µm thick.
Place of Conservation of Type Material:
Museum Victoria, Australia, M38528 and M43349.
Geological Setting of Type Material:
Lava-tube cave in basalt.
Associated Minerals at Type Locality:
Synonyms of Parwanite
Other Language Names for Parwanite
Common Associates
Associations Based on Photo Data:
| 3 photos of Parwanite associated with Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
| 2 photos of Parwanite associated with Taranakite | K3Al5(PO3OH)6(PO4)2 · 18H2O |
Related Minerals - Strunz-mindat Grouping
| 8.DO. | Whiterockite | CaMgMn3+3O2(PO4)2(CO3)F · 5H2O |
| 8.DO.05 | Girvasite | NaCa2Mg3(PO4)3(CO3)(H2O)6 |
| 8.DO.10 | Voggite | Na2Zr(PO4)(CO3)(OH) · 2H2O |
| 8.DO.15 | Peisleyite | Na2Al9[(P,S)O4]8(OH)6 · 28H2O |
| 8.DO.20 | Perhamite | Ca3Al7.7Si3P4O23.5(OH)14.1 · 8H2O |
| 8.DO.20 | Krásnoite | Ca3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2O |
| 8.DO.25 | Saryarkite-(Y) | Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2O |
| 8.DO.30 | Micheelsenite | (Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O |
| 8.DO.45 | Skorpionite | Ca3Zn2(PO4)2(CO3)(OH)2 · H2O |
| 8.DO.50 | Jörgkellerite | (Na,◻)3Mn3+3(PO4)2(CO3)(O,OH)2 · 5H2O |
| 8.DO.55 | Juansilvaite | Na5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2 · 4H2O |
| 8.DO.60 | Vanderheydenite | Zn6(PO4)2(SO4)(OH)4 · 7H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Parwanite
mindat.org URL:
https://www.mindat.org/min-31409.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Parwanite
Reference List:
Localities for Parwanite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Australia (TL) | |
| Birch et al. (1993) +1 other reference |
Quick NavTopAbout ParwaniteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Parwan lava caves, Parwan, Moorabool Shire, Victoria, Australia