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Parwanite Mineral Data
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General Parwanite Information
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 Chemical Formula: |
(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O |
| Composition: |
Molecular Weight = 1,775.14 gm |
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Potassium 0.55 % K 0.66 % K2O |
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Sodium 0.97 % Na 1.31 % Na2O |
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Calcium 2.26 % Ca 3.16 % CaO |
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Magnesium 4.11 % Mg 6.81 % MgO |
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Aluminum 12.16 % Al 22.98 % Al2O3 |
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Phosphorus 13.96 % P 31.98 % P2O5 |
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Hydrogen 3.80 % H 34.00 % H2O |
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Oxygen 62.19 % O |
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______ ______ |
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100.00 % 100.90 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.75K0.25Mg3CaAl8(PO4)8(OH)7•30(H2O) |
| IMA Status: |
Proposed IMA 2006 |
| Locality: |
Parwan lava cave, 45 km WNW of Melbourne, Victoria, Australia Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA1986-036a |
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Parwanite Image |
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Images:
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Parwanite
Comments: Translucent to white parwanite globules on montmorillonite matrix.
Location: Parwan Lava Caves, Bacchus Marsh Victoria, Australia.
Scale: Picture Size 2 x 3 mm.
© Diederik Visser |
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Parwanite Crystallography
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| Axial Ratios: |
a:b:c =2.2195:1:1.7395 |
| Cell Dimensions: |
a = 26.148, b = 11.781, c = 20.494, V = 6,313.17 |
| Crystal System: |
Monoclinic Space Group: P 2, Pm, P 2/m, P 21, |
| X Ray Diffraction: |
By Intensity(I/Io): 10.538(1), 10.031(0.14), 9.36(0.13),9.57(0.13), 12.202(0.12), 8.718(0.11), 4.878(0.1), 8.937(0.1), |
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Optical Properties of Parwanite
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| Optical Data: |
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Calculated Properties of Parwanite
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| Fermion Index: |
Fermion Index = 0.0044429145
Boson Index = 0.9955570855 |
| Photoelectric: |
PEParwanite = 1.53 barns/electron
U=PEParwanite x relectron= . barns/cc.
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| Radioactivity: |
GRapi = 8.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Parwanite per GRapi unit = 12.24 (%)
Estimated Radioactivity from Parwanite  - barely detectable
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Parwanite Classification
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| Dana Class: |
37.00.00.00 (37)Phosphate Minerals |
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(37.00)Without Dana Classification Numbers |
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(37.00.00)Phosphate, Basic Carbonate |
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37.00.00.00 Arnhemite* (K,Na)2Mg2(P2O7)•5(H2O) Unk Hex |
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37.00.00.00 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m |
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37.00.00.00 Auroantimonate* AuSbO3 Ortho ? Ortho |
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37.00.00.00 Barium-zinc-alumopharmacosiderite* (Ba,K)0.5(Zn,Cu)0.5(Al,Fe)4(AsO4)3•5(H2O)
I 42m 4 2m |
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37.00.00.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 41/amd 4/m 2/m 2/m |
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37.00.00.00 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)•2(H2O) Mono |
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37.00.00.00 Gengenbachite KFe3(H2PO4)2(HPO4)4•6H2OorKFe3H8(PO4)6•6H2O P 63mc 6mm |
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37.00.00.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m |
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37.00.00.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 63/m 6/m 2/m 2/m |
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37.00.00.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1 |
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37.00.00.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m |
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37.00.00.00 Krasnoselskite* CoWO4 P 2/c 2/m |
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37.00.00.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho |
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37.00.00.00 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4•6(H2O) Mono |
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37.00.00.00 Parwanite (Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O P 2, Pm, P 2/m, P 21, Mono |
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37.00.00.00 Pyrocoproite* (Mg(K,Na))2P2O7 Unk Mono |
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37.00.00.00 Pyrophosphite* K2CaP2O7 P 21/n 2/m |
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37.00.00.00 Zinclavendulan? NaCa(Zn,Cu)5(AsO4)4Cl•4-5(H2O) Unk Ortho |
| Strunz Class: |
08.DO.40 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.D - Phosphates, etc |
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08.DO -With CO3, SO4, SiO4 |
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08.DO.40 Parwanite (Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O P 2, Pm, P 2/m, P 21, Mono |
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Other Parwanite Information
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| See Also: |
Links to other databases for Parwanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Parwanite
(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O
Dana No: 37.00.00.00 Strunz No: 08.DO.40
Locality:
Notes:
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