Olivenite Mineral Data

Olivenite Mineral Data +

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General Olivenite Information

Chemical Formula:

Cu2AsO4(OH)

Composition:

Molecular Weight = 283.02 gm

Copper 44.91 % Cu 56.21 % CuO

Arsenic 26.47 % As 40.61 % As₂O₅

Hydrogen 0.36 % H 3.18 % H₂O

Oxygen 28.27 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₂(AsO₄)(OH)

IMA Status:

Valid Species (Pre-IMA) 1824

Locality:

Carharrack mine, Gwennap, Cornwall, England, GB Link to MinDat.org Location Data.

Name Origin:

From the German olivernerz, literally "olive" ore, in allusion to its typical color.

Synonym:

ICSD 1112

PDF 42.1353

Wood arsenate

Wood copper

Olivenite Image

Images:

Olivenite

Comments: Dark green crystals of olivenite on matrix.
Location: Majuba Hill mine, Pershing County, Nevada, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Olivenite Arsenogoyazite

Comments: White micro-botryoids of arsenogoyazite with light green acicular crystal sprays of olivenite and dark green malachite on brown limonite.
Location: Centennial Eureka Mine, Juab County, Utah. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Olivenite Crystallography

Axial Ratios:

a:b:c =1.0465:1:0.7223

Cell Dimensions:

a = 8.5894, b = 8.2073, c = 5.9285, Z = 4; beta = 90.088° V = 417.93 Den(Calc)= 4.50

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 2.98(1), 4.82(0.9), 5.91(0.7),

Forms:

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Forms: [ 1 1 0] [ 0 1 0] [ 1 0 1] [ 1 0 0] [ 0 1 1]

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Crystal Structure:

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Burns P C , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.885-888, Rietveld refinement of the crystal structure of olivenite: A twinned monoclinic, structure

View Additional jPOWD Structure files for Olivenite
[1]

Physical Properties of Olivenite

Cleavage:

[110] Indistinct, [010] Indistinct, [110] Indistinct

Color:

Olive green, Yellowish brown, Dirty white, Blackish green, Liver brown.

Density:

4.1 - 4.4, Average = 4.25

Diaphaniety:

Subtransparent to translucent to opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

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

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

3 - Calcite

Luminescence:

None.

Luster:

Vitreous - Greasy

Streak:

yellowish green

Optical Properties of Olivenite

Gladstone-Dale:

CI meas= -0.108 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.047 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1802,KPDmeas= 0.1908,KC= 0.1722

Optical Data:

Biaxial (+), a=1.772, b=1.785-1.81, g=1.863, bire=0.0910, 2V(Calc)=46-84, 2V(Meas)=80-90. Dispersion relatively strong.

Calculated Properties of Olivenite

Electron Density:

r_electron=4.20 gm/cc
note: r_Olivenite=4.50 gm/cc.

Fermion Index

Fermion Index = 0.00013
Boson Index = 0.99987

Photoelectric:

PE_Olivenite= 38.64 barns/electron
U=PE_Olivenite x r_electron= 162.20 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Olivenite is Not Radioactive

Olivenite Classification

Dana Class:

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

(41.6)where (A)2 (XO4) Zq

(41.6.6)Dana Group

41.6.6.1 Olivenite Cu2AsO4(OH) P 2₁/n 2/m

41.6.6.2 Libethenite Cu2(PO4)(OH) Pnnm 2/m 2/m 2/m

41.6.6.3 Adamite Zn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

41.6.6.4 Eveite Mn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

41.6.6.5 Zincolibethenite! CuZn(PO4)OH Pnnm 2/m 2/m 2/m

Strunz Class:

VII/B.06-20 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.06 - Adamite group, Libethenite - Paradamite

VII/B.06-10 Libethenite Cu2(PO4)(OH) Pnnm 2/m 2/m 2/m

VII/B.06-20 Olivenite Cu2AsO4(OH) P 2₁/n 2/m

VII/B.06-30 Adamite Zn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

VII/B.06-40 Eveite Mn2(AsO4)(OH) Pnnm 2/m 2/m 2/m

VII/B.06-50 Tarbuttite Zn2(PO4)(OH) P1 1

VII/B.06-60 Paradamite Zn2(AsO4)(OH) P1 1

Other Olivenite Information

References:

NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Sinkankas66)

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

Olivenite

Cu2AsO4(OH)
Dana No: 41.6.6.1 Strunz No: VII/B.06-20
Locality:

Notes: