Szenicsite Mineral Data

Szenicsite Mineral Data +

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General Szenicsite Information

Chemical Formula:

Cu3MoO4(OH)4

Composition:

Molecular Weight = 418.60 gm

Copper 45.54 % Cu 57.01 % CuO

Molybdenum 22.92 % Mo 34.39 % MoO₃

Hydrogen 0.96 % H 8.61 % H₂O

Oxygen 30.58 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₃(MoO₄)(OH)₄

IMA Status:

Approved IMA 1994

Locality:

Jardinera No. 1 mine near Inca de Oro, 80 km north of Copiapo, Chile. Link to MinDat.org Location Data.

Name Origin:

Named after its finders, Terry and Marissa Szenics.

Synonym:

ICSD 86868

IMA1993-011

Szenicsite Image

Images:

Szenicsite

Comments: Deep green szenicsite crystals on siliceous green to brown jasperoid.
Location: Jardinera #1 Mine, Atacama Province, Chile. Scale: 6.2 x 3.5 cm.
© John Veevaert

Szenicsite Crystallography

Axial Ratios:

a:b:c =0.6744:1:0.4843

Cell Dimensions:

a = 8.449, b = 12.527, c = 6.067, Z = 4; V = 642.14 Den(Calc)= 4.33

Crystal System:

OrthorhombicSpace Group: Pnnm, Pnn2

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

By Intensity(I/I_o): 3.759(1), 2.591(0.67), 2.773(0.57),

Forms:

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Forms: [ 1 1 0] [ 2 1 1] [ 1 0 0]

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Crystal Structure:

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Stolz J , Armbruster T , Neues Jahrbuch fur Mineralogie, Monatshefte , 1998 (1998) p.278-288, X-ray single-crystal structure refinement of szenicsite, Cu3MoO4(OH)4,, and its relation to the structure of antlerite, Cu3SO4(OH)4, Locality: Jardinera No. 1, Inca de Oro, Atacama, Chile

Physical Properties of Szenicsite

Cleavage:

[???] Perfect

Color:

Dark green.

Density:

4.26

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

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

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Adamantine

Streak:

green

Optical Properties of Szenicsite

Gladstone-Dale:

CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2064,KPDmeas= 0.2098,KC= 0.2077

Optical Data:

Biaxial (+), a=1.886, b=1.892, g=1.903, bire=0.0170, 2V(Calc)=74, 2V(Meas)=74. Dispersion r > v strong.

Pleochroism (x):

yellowish green.

Pleochroism (y):

green.

Pleochroism (z):

green.

Calculated Properties of Szenicsite

Electron Density:

r_electron=4.08 gm/cc
note: r_Szenicsite=4.33 gm/cc.

Fermion Index

Fermion Index = 0.05852
Boson Index = 0.94148

Photoelectric:

PE_Szenicsite= 57.64 barns/electron
U=PE_Szenicsite x r_electron= 234.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Szenicsite is Not Radioactive

Szenicsite Classification

Dana Class:

48.3.5.1 (48)Anhydrous Molybdates and Tungstates

(48.3)(Basic Anhydrous)

(48.3.5)Dana Group

48.3.5.1 Szenicsite Cu3MoO4(OH)4 Pnnm, Pnn2 Ortho

Strunz Class:

VI/G.02-15 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/G - Molybdates [MoO4]2- and wolframates [WO4]2-

VI/G.02 - Lindgrenite - Phyllotungstite series

VI/G.02-05 Biehlite! (Sb,As)2MoO6 C 2/c 2/m

VI/G.02-10 Lindgrenite Cu3(MoO4)2(OH)2 P 2₁/n 2/m

VI/G.02-15 Szenicsite Cu3MoO4(OH)4 Pnnm, Pnn2 Ortho

VI/G.02-20 Cuprotungstite Cu3(WO4)2(OH)2 Unk Tetra

VI/G.02-25 Vergasovaite! Cu3O[(Mo,S)O4][SO4] P nma 2/m 2/m 2/m

VI/G.02-30 Ferrimolybdite Fe2(MoO4)3·8(H2O) Unk Ortho

VI/G.02-40 Phyllotungstite CaFe3H(WO4)6·10(H2O) P 222,Pmm2,P mmm Ortho

Other Szenicsite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.79,p1210,1994) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Szenicsite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Szenicsite

Cu3MoO4(OH)4
Dana No: 48.3.5.1 Strunz No: VI/G.02-15
Locality:

Notes: