Xocolatlite Mineral Data

General Xocolatlite Information

Chemical Formula:

Ca2Mn++++2Te++++++2O12•H2O

Composition:

Molecular Weight = 655.24 gm

Calcium 12.23 % Ca 17.12 % CaO

Manganese 16.77 % Mn 26.54 % MnO₂

Tellurium 38.95 % Te 48.71 % TeO₂

Hydrogen 0.31 % H 2.75 % H₂O

Oxygen 31.74 % O

______ ______

100.00 % 95.12 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mn⁴⁺₂Te₂O₁₂•(H₂O)

Environment:

Tellurate.

IMA Status:

Approved IMA 2007 (Dana # Added)

Locality:

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

Name Origin:

The name is in allusion to its chocolate-brown color and its Mexican type locality which is used to indicate the color of a sacred beverage made by mixing cocoa (Xocolatl), water, v anilla, pepper, and chili.

Synonym:

IMA2007-020

Xocolatlite Image

Images:

Xocolatlite

Comments: SEM image showing the gel-like texture in xocolatlite at the contact with quartz. (AmMin, v93:1912).
Location: Bambolla mine, Moctezuma, Sonora, Mexico. Scale: See Image.
© American Mineralogist

Xocolatlite Crystallography

Axial Ratios:

a:b:c =2.1828:1:1.8145

Cell Dimensions:

a = 10.757, b = 4.928, c = 8.942, Z = 2; beta = 102.39° V = 462.98 Den(Calc)= 4.70

Crystal System:

MonoclinicSpace Group: P 2, P 2/m, Pm, P 2₁, P 3₁/m

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

By Intensity(I/I_o): 3.267(1), 2.52(0.71), 4.361(0.51),1.762(0.39), 4.924(0.34), 2.244(0.32), 1.455(0.24), 1.996(0.21),

Physical Properties of Xocolatlite

Cleavage:

{001} Perfect

Color:

Chocolate brown.

Density:

4.1

Diaphaneity:

Transparent

Fracture:

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

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Micaceous - Platy texture with "flexible" plates.

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous (Glassy)

Streak:

copper brown

Optical Properties of Xocolatlite

Gladstone-Dale:

CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.141 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2128,KPDmeas= 0.2439,KC= 0.2478
Ncalc = 2.02 - 2.16

Optical Data:

Biaxial (?), a=2, g=2, bire=0.0000

Calculated Properties of Xocolatlite

Electron Density:

Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Xocolatlite =4.10 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Xocolatlite= 136.71 barns/electron
U=PE_Xocolatlite x rElectron Density= 513.26 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Xocolatlite is Not Radioactive

Xocolatlite Classification

Dana Class:

33.02.10.01 (33)Selenates and Tellurates

(33.02)as A+ (B++)m XO6 Zq · x(H2O) where x can equal 0

(33.02.10)Dana Group

33.02.10.01 Xocolatlite! Ca2Mn2Te2O12•H2O P 2, P 2/m, Pm, P 2₁, P 3₁/m Mono

Strunz Class:

07.DF.85 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DF -With large and medium-sized cations

07.DF.85 Xocolatlite! Ca2Mn2Te2O12•H2O P 2, P 2/m, Pm, P 2₁, P 3₁/m Mono

Other Xocolatlite Information

References:

NAME( AmMin, v93:1911) PHYS. PROP.(AmMin, v93:1911) OPTIC PROP.(AmMin, v93:1911)

See Also:

Links to other databases for Xocolatlite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ask about Xocolatlite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Xocolatlite

Ca2Mn++++2Te++++++2O12•H2O
Dana No: 33.02.10.01 Strunz No: 07.DF.85
Locality:

Notes: