Parwanite Mineral Data

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General Parwanite Information

Chemical Formula:

(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O

Composition:

Molecular Weight = 1,775.14 gm

Potassium 0.55 % K 0.66 % K₂O

Sodium 0.97 % Na 1.31 % Na₂O

Calcium 2.26 % Ca 3.16 % CaO

Magnesium 4.11 % Mg 6.81 % MgO

Aluminum 12.16 % Al 22.98 % Al₂O₃

Phosphorus 13.96 % P 31.98 % P₂O₅

Hydrogen 3.80 % H 34.00 % H₂O

Oxygen 62.19 % O

______ ______

100.00 % 100.90 % = TOTAL OXIDE

Empirical Formula:

Na_0.75K_0.25Mg₃CaAl₈(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

Parwanite Image

Images:

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

Parwanite Crystallography

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:

MonoclinicSpace Group: P 2, Pm, P 2/m, P 2₁,

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Optical Properties of Parwanite

Optical Data:

Calculated Properties of Parwanite

Fermion Index:

Fermion Index = 0.0044429145
Boson Index = 0.9955570855

Photoelectric:

PE_Parwanite= 1.53 barns/electron
U=PE_Parwanite x r_electron= . barns/cc.

Radioactivity:

GRapi = 8.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Parwanite per GRapi unit = 12.24 (%)

Estimated Radioactivity from Parwanite - barely detectable

Parwanite Classification

Dana Class:

37.00.00.00 (37)Phosphate Minerals

(37.00)Without Dana Classification Numbers

(37.00.00)Phosphate, Basic Carbonate

37.00.00.00 Arnhemite* (K,Na)2Mg2(P2O7)•5(H2O) Unk Hex

37.00.00.00 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m

37.00.00.00 Auroantimonate* AuSbO3 Ortho ? Ortho

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

37.00.00.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 4₁/amd 4/m 2/m 2/m

37.00.00.00 Churchite-(Dy)* (Dy,Sm,Gd,Nd)(PO4)•2(H2O) Mono

37.00.00.00 Gengenbachite KFe3(H2PO4)2(HPO4)4•6H2OorKFe3H8(PO4)6•6H2O P 6₃mc 6mm

37.00.00.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m

37.00.00.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 6₃/m 6/m 2/m 2/m

37.00.00.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1

37.00.00.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m

37.00.00.00 Krasnoselskite* CoWO4 P 2/c 2/m

37.00.00.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho

37.00.00.00 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4•6(H2O) Mono

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

37.00.00.00 Pyrocoproite* (Mg(K,Na))2P2O7 Unk Mono

37.00.00.00 Pyrophosphite* K2CaP2O7 P 2₁/n 2/m

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

08.D - Phosphates, etc

08.DO -With CO3, SO4, SiO4

08.DO.40 Parwanite (Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7•30H2O P 2, Pm, P 2/m, P 2₁, Mono

Other Parwanite Information

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

Search for Parwanite using:

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Ask about Parwanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Parwanite Specimen Label here :

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: