Xocomecatlite Mineral Data

Xocomecatlite Mineral Data +

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General Xocomecatlite Information

Chemical Formula:

Cu3Te++++++O4(OH)4

Composition:

Molecular Weight = 450.26 gm

Copper 42.34 % Cu 53.00 % CuO

Tellurium 28.34 % Te 35.45 % TeO₂

Hydrogen 0.90 % H 8.00 % H₂O

Oxygen 28.43 % O

______ ______

100.00 % 96.45 % = TOTAL OXIDE

Empirical Formula:

Cu₃(TeO₄)(OH)₄

Environment:

In cracks in altered rhyolite.

IMA Status:

Approved IMA 1975

Locality:

Bambollita mine, Moctezuma, Sonora, Mexico. Link to MinDat.org Location Data.

Name Origin:

Named for the Nahuatl for "bunches of grapes", in allusion to the appearance of the green spherules of the mineral.

Xocomecatlite Image

Images:

Xocomecatlite

Comments: Green botryoidal xocomecatlite coatings.
Location: Mina Bambollita, Moctezuma, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Xocomecatlite

Comments: Green spheroidal crystals to 0.5 mm of very rare xocometcatlite.
Location: Centennial-Eureka mine, Tintic district, Utah, USA. Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix

Xocomecatlite Crystallography

Axial Ratios:

a:b:c =0.8478:1:0.8144

Cell Dimensions:

a = 12.14, b = 14.318, c = 11.662, Z = 12; V = 2,027.09 Den(Calc)= 4.43

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 4.627(1), 2.673(0.6), 3.439(0.4),

Physical Properties of Xocomecatlite

Color:

Green, Emerald green.

Density:

4.65

Fracture:

Tough - Difficult to break apart as shown by fibrous minerals and most metals.

Habit:

Botryoidal - "Grape-like" rounded forms (e.g.. malachite).

Habit:

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

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Streak:

light green

Optical Properties of Xocomecatlite

Gladstone-Dale:

CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1953,KPDmeas= 0.186,KC= 0.1886

Optical Data:

Biaxial (-), a=1.775, b=1.9, g=1.92, bire=0.1450, 2V(Calc)=40, 2V(Meas)=41. Dispersion low.

Pleochroism (y):

rich bluish green.

Calculated Properties of Xocomecatlite

Electron Density:

r_electron=4.28 gm/cc
note: r_{Xocomecatlite}=4.65 gm/cc.

Fermion Index

Fermion Index = 0.02278
Boson Index = 0.97722

Photoelectric:

PE_{Xocomecatlite}= 114.00 barns/electron
U=PE_{Xocomecatlite} x r_electron= 487.39 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Xocomecatlite is Not Radioactive

Xocomecatlite Classification

Dana Class:

33.1.2.1 (33)Selenates and Tellurates

(33.1)as A+ (B++)m XO4 Zq

(33.1.2)Dana Group

33.1.2.1 Xocomecatlite Cu3TeO4(OH)4 Unk Ortho

Strunz Class:

IV/K.15-12 IV - Oxides

IV/K - Complex Tellurides with [TeO6]6-, [TeO3]2- and [TeO4]2- groups

IV/K.15 - Yafsoanite - Cuzticite series

IV/K.15-10 Frankhawthorneite Cu2TeO4(OH)2 P 2₁/n 2/m

IV/K.15-12 Xocomecatlite Cu3TeO4(OH)4 Unk Ortho

IV/K.15-15 Mcalpineite Cu3TeO6·(H2O) Unk Cubic

IV/K.15-16 Jensenite Cu3TeO6·2(H2O) P 2₁/n 2/m

IV/K.15-18 Leisingite! Cu(Mg,Cu,Fe,Zn)2TeO6·6(H2O) P 31m 3 2/m

IV/K.15-19 Utahite! Cu5Zn3(TeO4)4(OH)8·7(H2O) P1 or P1 Tri

IV/K.15-20 Cuzticite Fe2TeO6·3(H2O) Unk Hex

IV/K.15-30 Yafsoanite Ca3Te2Zn3O12 I a3d 4/m 3 2/m

IV/K.15-40 Khinite PbCu3TeO6(OH)2 F ddd 2/m 2/m 2/m

IV/K.15-50 Parakhinite Cu3PbTeO4(OH)6 P 6₂22 or P 6₄22 6 2 2

IV/K.15-60 Montanite Bi2TeO6·2(H2O) Mono

Other Xocomecatlite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Xocomecatlite :
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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Print or Cut-and-Paste your Xocomecatlite Specimen Label here :

Xocomecatlite

Cu3Te++++++O4(OH)4
Dana No: 33.1.2.1 Strunz No: IV/K.15-12
Locality:

Notes: