Nevadaite Mineral Data

Nevadaite Mineral Data

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General Nevadaite Information

Chemical Formula:

(Cu++,[ ],Al,V+++)6[Al8(PO4)8F8] (H2O)23

Composition:

Molecular Weight = 1,758.65 gm

Aluminum 14.04 % Al 26.52 % Al₂O₃

Vanadium 2.84 % V 4.18 % V₂O₃

Zinc 0.07 % Zn 0.09 % ZnO

Copper 7.23 % Cu 9.05 % CuO

Phosphorus 13.91 % P 31.88 % P₂O₅

Hydrogen 2.58 % H 23.01 % H₂O

Oxygen 50.29 % O

Fluorine 9.04 % F 9.04 % F

- % F -3.81 % -O=F₂

______ ______

100.00 % 99.97 % = TOTAL OXIDE

Empirical Formula:

Cu₂Zn_0.02V³⁺_0.98Al_1.15Al₈P_7.9O₃₂F_8.37(OH)_1.63(H₂O)_21.65

Environment:

Secondary mineral found in the upper supergene zone of the Carlin-trend gold belt. New structure type

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

5425-5375 (elevation) benches, Gold Quarry open-pit mine near Carlin, Eureka County, Nevada. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Synonym:

IMA2002-035

Nevadaite Image

Images:

Nevadaite

Comments: Robin's egg blue radiating acicular sprays of nevadaite to about 0.3 mm.
Location: Gold Quarry mine, Eureka Co., Nevada, USA. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

Nevadaite Crystallography

Axial Ratios:

a:b:c =0.638:1:0.2611

Cell Dimensions:

a = 12.123, b = 18.999, c = 4.961, Z = 1; V = 1,142.64 Den(Calc)= 2.56

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁mn

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

By Intensity(I/I_o): 6.077(1)(200), 5.618(0.9)(130), 9.535(0.8)(020),2.983(0.6)(241), 2.661(0.4)(061), 3.43(0.4)(041), 1.844(0.4)(352),

Crystal Structure:

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Cooper M A , Hawthorne F C , Roberts A C , Foord E E , Erd R C , Evans H T , Jensen M C , The Canadian Mineralogist , 42 (2004) p.741-752

Physical Properties of Nevadaite

Cleavage:

None

Color:

Pale green, Turquoise.

Density:

2.54

Diaphaniety:

Translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

pale powder blue

Optical Properties of Nevadaite

Gladstone-Dale:

CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2137,KPDmeas= 0.2154,KC= 0.2229

Optical Data:

Biaxial (-), a=1.54, b=1.548, g=1.553, bire=0.0130

Calculated Properties of Nevadaite

Electron Density:

r_electron=2.55 gm/cc
note: r_Nevadaite=2.54 gm/cc.

Fermion Index

Fermion Index = 0.00034
Boson Index = 0.99966

Photoelectric:

PE_Nevadaite= 4.78 barns/electron
U=PE_Nevadaite x r_electron= 12.16 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nevadaite is Not Radioactive

Nevadaite Classification

Dana Class:

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

(42.6)where (AB)2 (XO4) Zq · x(H2O)

(42.6.13)Dana Group

42.6.13.1 Nevadaite ! (Cu,[],Al,V)6[Al8(PO4)8F8](H2O)23 P 2₁mn 2 2 2

Strunz Class:

VII/D.07-70 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.07 - Nissonite - Euchroite - Spencerite series

VII/D.07-10 Nissonite Cu2Mg2(PO4)2(OH)2·5(H2O) C 2/c 2/m

VII/D.07-20 Strashimirite Cu8(AsO4)4(OH)4·5(H2O) P 2/m,P 2,Pm Mono

VII/D.07-30 Euchroite Cu2(AsO4)(OH)·3(H2O) P 2₁2₁2₁ 2 2 2

VII/D.07-40 Arhbarite Cu2Mg(AsO4)(OH)3 P1 1

VII/D.07-50 Legrandite Zn2(AsO4)(OH)·(H2O) P 2₁/c 2/m

VII/D.07-60 Spencerite Zn4(PO4)2(OH)2·3(H2O) P 2/c 2/m

VII/D.07-70 Nevadaite (Cu,[],Al,V)6[Al8(PO4)8F8](H2O)23 P 2₁mn 2 2 2

Other Nevadaite Information

References:

NAME( CanMin, v 41 ,p 741) PHYS. PROP.(CanMin, v 41 ,p 741) OPTIC PROP.(CanMin, v 41 ,p 741)

See Also:

Links to other databases for Nevadaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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

Nevadaite

(Cu++,[ ],Al,V+++)6[Al8(PO4)8F8] (H2O)23
Dana No: 42.6.13.1 Strunz No: VII/D.07-70
Locality:

Notes: