Kunatite Mineral Data

General Kunatite Information

Chemical Formula:

CuFe+++2(PO4)2(OH)2•4H2O

Composition:

Molecular Weight = 454.25 gm

Iron 24.59 % Fe 35.16 % Fe₂O₃

Copper 13.99 % Cu 15.75 % Cu₂O

Phosphorus 13.64 % P 31.25 % P₂O₅

Hydrogen 2.00 % H 17.85 % H₂O

Oxygen 45.79 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuFe³⁺₂(PO₄)₂(OH)•4(H₂O)

Environment:

Whitmoreite group

IMA Status:

Proposed IMA 2007

Locality:

Granite quarry 10 km SSW of the township of Lake Boga, northwestern Victoria, Australia Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2007-057

Kunatite Crystallography

Axial Ratios:

a:b:c =1.0209:1:0.5668

Cell Dimensions:

a = 9.863, b = 9.661, c = 5.476, Z = 2; beta = 92.45° V = 521.31 Den(Calc)= 2.89

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 9.849(1), 4.386(0.9), 4.924(0.8),6.892(0.8), 2.697(0.6), 4.333(0.45), 4.225(0.35), 2.654(0.31),

Optical Properties of Kunatite

Optical Data:

NCalc= 1.77 - from Gladstone-Dale relationship (KC = 0.2655) where Ncalc=Dcalc*KC+1

Calculated Properties of Kunatite

Electron Density:

Bulk Density (Electron Density)=2.85 gm/cc
note: Specific Gravity of Kunatite =2.89 gm/cc.

Fermion Index:

Fermion Index = 0.0054355605
Boson Index = 0.9945644395

Photoelectric:

PE_Kunatite= 13.94 barns/electron
U=PE_Kunatite x rElectron Density= 39.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kunatite is Not Radioactive

Kunatite Classification

Dana Class:

42.11.18.07 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq ï¿½ x(H2O)

(42.11.18)Whitmoreite Group

42.11.18.01 Whitmoreite FeFe2(PO4)2(OH)2•4(H2O) P 2₁/c 2/m

42.11.18.02 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2•4(H2O) P 2₁/c 2/m

42.11.18.03 Ojuelaite ZnFe2(AsO4)2(OH)2•4(H2O) P 2₁/c 2/m

42.11.18.04 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2•4(H2O) P 2₁/c 2/m

42.11.18.05 Gladiusite! Fe2(Fe,Mg)4(PO4)(OH)13•H2O P 2₁/n 2/m

42.11.18.06 Cobaltarthurite! CoFe2(AsO4)2(OH)2•4(H2O) P 2₁/c 2/m

42.11.18.07 Kunatite CuFe2(PO4)2(OH)2•4H2O P 2₁/c 2/m

42.11.18.08 Bendadaite! FeFe2(AsO4)2(OH)2•4H2O P 2₁/c 2/m

Strunz Class:

08.DC.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

08.DC.15 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2•4(H2O) P 2₁/c 2/m

08.DC.15 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2•4(H2O) P 2₁/c 2/m

08.DC.15 Ojuelaite ZnFe2(AsO4)2(OH)2•4(H2O) P 2₁/c 2/m

08.DC.15 Whitmoreite FeFe2(PO4)2(OH)2•4(H2O) P 2₁/c 2/m

08.DC.15 Cobaltarthurite! CoFe2(AsO4)2(OH)2•4(H2O) P 2₁/c 2/m

08.DC.15 Kunatite CuFe2(PO4)2(OH)2•4H2O P 2₁/c 2/m

08.DC.15 Bendadaite! FeFe2(AsO4)2(OH)2•4H2O P 2₁/c 2/m

Other Kunatite Information

See Also:

Links to other databases for Kunatite :
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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Print or Cut-and-Paste your Kunatite Specimen Label here :

Kunatite

CuFe+++2(PO4)2(OH)2•4H2O
Dana No: 42.11.18.07 Strunz No: 08.DC.15
Locality:

Notes:

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