Chloromenite Mineral Data

Chloromenite Mineral Data

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General Chloromenite Information

Chemical Formula:

Cu9O2(SeO3)4Cl6

Composition:

Molecular Weight = 1,324.46 gm

Copper 43.18 % Cu 54.05 % CuO

Selenium 23.85 % Se 33.51 % SeO₂

Chlorine 16.06 % Cl 16.06 % Cl

- % Cl -3.62 % -O=Cl₂

Oxygen 16.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₉O₂(SeO₃)₄Cl₆

Environment:

Found in a fumarole.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

The Northern Breach of the Great Fissure Tolbachik eruption, Kamchatka Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

The name comes from chloros, green, and mene, moon, referring to the presence of essential selenium.

Synonym:

IMA1996-048

Chloromenite Image

Images:

Click Here for Larger Chloromenite Image

Chloromenite Melanothallite

Comments: Olive green crystalline chloromenite on blue-green melanothallite.
Location: North Break, Second Cone of main fracture eruption, Tolbachik Volcano, Kamchatka District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chloromenite Crystallography

Axial Ratios:

a:b:c =2.2489:1:2.072

Cell Dimensions:

a = 14.11, b = 6.274, c = 13, Z = 2; beta = 113° V = 1,059.35 Den(Calc)= 4.15

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

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

By Intensity(I/I_o): 3.45(1), 5.56(0.83), 11.29(0.63),

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Physical Properties of Chloromenite

Cleavage:

[101] Perfect

Color:

Tobacco green.

Diaphaniety:

Transparent

Fracture:

Plastic - Deforms like soft, plastic materials.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

1.5-2.5 - Hardness very near Gypsum

Luster:

Vitreous (Glassy)

Streak:

yellowish green

Optical Properties of Chloromenite

Gladstone-Dale:

CI calc= -0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2193,KC= 0.208

Optical Data:

Biaxial (-), a=1.87, b=1.92, g=1.94, bire=0.0700

Calculated Properties of Chloromenite

Electron Density:

r_electron=3.83 gm/cc
note: r_Chloromenite=4.15 gm/cc.

Fermion Index

Fermion Index = 0.0182
Boson Index = 0.9818

Photoelectric:

PE_Chloromenite= 38.99 barns/electron
U=PE_Chloromenite x r_electron= 149.29 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chloromenite is Not Radioactive

Chloromenite Classification

Dana Class:

34.6.7.1 (34)Selenites - Tellurites - Sulfites

(34.6)Dana Type

(34.6.7)Dana Group

34.6.7.1 Chloromenite ! Cu9O2(SeO3)4Cl6 I2/m 2/m

34.6.7.2 Georgbokiite! Cu5O2(SeO3)2Cl2 P 2₁/c 2/m

Strunz Class:

IV/J.05-55 IV - Oxides

IV/J - Arsenides with [AsO3]3- groups

IV/J.05 - Asbeckasite - Cafarsite series

IV/J.05-10 Chadwickite! (UO2)H(AsO3) Tetra

IV/J.05-20 Cafarsite Ca8(Ti,Fe,Fe,Mn)6-7(AsO3)12·4(H2O) P n3 2/m 3

IV/J.05-50 Georgbokiite! Cu5O2(SeO3)2Cl2 P 2₁/c 2/m

IV/J.05-55 Chloromenite Cu9O2(SeO3)4Cl6 I2/m 2/m

IV/J.05-60 Ilinskite! NaCu5O2(SeO3)2Cl Pbnm 2/m 2/m 2/m

Other Chloromenite Information

References:

NAME( CanMin, 8/99) PHYS. PROP.(AmMin, V84, p1464) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Chloromenite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Chloromenite

Cu9O2(SeO3)4Cl6
Dana No: 34.6.7.1 Strunz No: IV/J.05-55
Locality:

Notes: