Zinclipscombite Mineral Data

General Zinclipscombite Information

Chemical Formula:

ZnFe+++2(PO4)2(OH)

Composition:

Molecular Weight = 386.04 gm

Calcium 0.21 % Ca 0.29 % CaO

Aluminum 2.52 % Al 4.75 % Al₂O₃

Zinc 12.87 % Zn 16.02 % ZnO

Iron 24.88 % Fe 35.58 % Fe₂O₃

Arsenic 2.72 % As 4.17 % As₂O₅

Phosphorus 14.92 % P 34.20 % P₂O₅

Hydrogen 0.56 % H 4.99 % H₂O

Oxygen 41.32 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn_0.76Ca_0.02Fe³⁺_1.72Al_0.36(PO₄)_1.86(AsO₄)_0.14(OH)_1.8(H₂O)_0.17

Environment:

Lipscombite group

IMA Status:

Approved IMA 2006 (Dana # Added)

Locality:

Silver Coin mine, Valmy, Edna Mountains, Humboldt Co., Nevada, USA Link to MinDat.org Location Data.

Name Origin:

Named as the Zn analogue of lipscombite (Fe)

Synonym:

iMA2006-008

Zinclipscombite Crystallography

Axial Ratios:

a:c = 1:1.81234

Cell Dimensions:

a = 7.242, c = 13.125, Z = 4; V = 688.36 Den(Calc)= 3.72

Crystal System:

Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: P 4₃2₁2 or P 4₁2₁2

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

By Intensity(I/I_o): 3.326(1), 4.79(0.8), 3.21(0.6),1.605(0.5), 1.663(0.45), 2.602(0.45), 2.049(0.4), 2.299(0.4),

Physical Properties of Zinclipscombite

Cleavage:

None

Color:

Dark green, Brown.

Density:

3.65

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

light greenish tan

Optical Properties of Zinclipscombite

Gladstone-Dale:

CI meas= 0.093 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.11 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2083,KPDmeas= 0.2123,KC= 0.2341
Ncalc = 1.85 - 1.87

Optical Data:

Uniaxial (+), w=1.755, e=1.795, bire=0.0400.

Calculated Properties of Zinclipscombite

Electron Density:

Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Zinclipscombite =3.65 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Zinclipscombite}= 16.48 barns/electron
U=PE_{Zinclipscombite} x rElectron Density= 58.29 barns/cc.

Radioactivity:

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

Zinclipscombite Classification

Dana Class:

41.10.02.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.02)Lipscombite Group

41.10.02.01 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 4₁2₁2 4 2 2

41.10.02.02 Zinclipscombite! ZnFe2(PO4)2(OH) P 4₃2₁2 or P 4₁2₁2 4 2 2

Strunz Class:

08.BB.90 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1

08.BB.90 Lipscombite (Fe,Mn)Fe2(PO4)2(OH)2 P 4₁2₁2 4 2 2

08.BB.90 Richellite Ca3Fe10(PO4)8(OH)12•n(H2O) P 4 4

08.BB.90 Zinclipscombite! ZnFe2(PO4)2(OH) P 4₃2₁2 or P 4₁2₁2 4 2 2

Other Zinclipscombite Information

References:

NAME( Geology of Ore Deposits, v49:509) PHYS. PROP.(Geology of Ore Deposits, v49:509) OPTIC PROP.(Geology of Ore Deposits, v49:509)

See Also:

Links to other databases for Zinclipscombite :
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 Zinclipscombite Specimen Label here :

Zinclipscombite

ZnFe+++2(PO4)2(OH)
Dana No: 41.10.02.02 Strunz No: 08.BB.90
Locality:

Notes:

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