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Xocolatlite

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Big Photo

Moctezuma Mine (Bambolla Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico
© G. Armellino

Show Xocolatlite Photos (3)



Formula:
Ca
 
2
Mn
4+
2
(Te
6+
 
O
 
6
)
 
2
 · H
 
2
O
System:MonoclinicColour:chocolate-brown (RAL ...
Hardness:2 - 3
Name:Derived from the Nahuatl word 'xocolatl' or 'xocoatl', meaning 'bitter water', and is the root for 'chocolate', in reference to the mineral's chocolate-brown color, and the Mexican type-locality.


Probably related to kuranakhite.

Classification of Xocolatlite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:7.DF.85

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
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Type Occurrence of Xocolatlite

Type Locality:Moctezuma Mine (Bambolla Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico
General Appearance of Type Material:brown crystalline crusts
Year of Discovery:2002
Geological Setting of type material:epithermal quartz-tellurium-gold vein system
Associated Minerals at type locality:
SchmitteriteQuartzJarositeEztliteEmmonsite
Baryte

Physical Properties of Xocolatlite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:chocolate-brown (RAL 8017)
Streak:copper-brown (RAL 8004)
Hardness (Mohs):2 - 3
Hardness Data:Measured
Tenacity:Brittle
Cleavage:Perfect
mica-like
Fracture:Conchoidal
Density (calculated):4.70 g/cm3

Crystallography of Xocolatlite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P2/m {P1 1 2/m} {P2/m} {P1 2/m 1}
Cell Parameters:a = 10.757(3) Å, b = 4.928(3) Å, c = 8.492(2) Å
β = 102.39(3)°
Ratio:a:b:c = 2.183 : 1 : 1.723
Unit Cell Volume:V 463 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.267 (100)
2.52 (71)
4.361 (51)
1.762 (39)
4.924 (34)
2.244 (32)
1.455 (24)
1.996 (21)
1.565 (20)
2.353 (18)

Chemical Properties of Xocolatlite

Formula:
Ca
 
2
Mn
4+
2
(Te
6+
 
O
 
6
)
 
2
 · H
 
2
O
Essential elements:Ca, H, Mn, O, Te
All elements listed in formula:Ca, H, Mn, O, Te

Relationship of Xocolatlite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DF.05Uklonskovite
NaMg(SO
 
4
)F · 2H
 
2
O
7.DF.10Kainite
KMg(SO
 
4
)Cl · 3H
 
2
O
7.DF.15Natrochalcite
NaCu
 
2
(SO
 
4
)
 
2
(OH) · 2H
 
2
O
7.DF.20Metasideronatrite
Na
 
4
Fe
 
2
(SO
 
4
)
 
4
(OH)
 
2
 · 2H
 
2
O
7.DF.20Sideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
(OH) · 3H
 
2
O
7.DF.25Despujolsite
Ca
 
3
Mn
4+
 
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DF.25Fleischerite
Pb
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DF.25Schaurteite
Ca
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
7.DF.25Mallestigite
Pb
 
3
Sb
5+
 
(SO
 
4
)(AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
7.DF.30Slavíkite
(H
 
3
O
+
 
)
 
3
Mg
 
6
Fe
 
15
(SO
 
4
)
 
21
(OH)
 
18
 · 99H
 
2
O
7.DF.35Metavoltine
Na
 
6
K
 
2
FeFe
 
6
(SO
 
4
)
 
12
O
 
2
 · 18H
 
2
O
7.DF.40Lannonite
HCa
 
4
Mg
 
2
Al
 
4
(SO
 
4
)
 
8
F
 
9
 · 32H
 
2
O
7.DF.40Vlodavetsite
AlCa
 
2
(SO
 
4
)
 
2
F
 
2
Cl · 4H
 
2
O
7.DF.45Peretaite
Ca(SbO)
 
4
(SO
 
4
)
 
2
(OH)
 
2
 · 2H
 
2
O
7.DF.50Gordaite
NaZn
 
4
(SO
 
4
)(OH)
 
6
Cl · 6H
 
2
O
7.DF.55Clairite
(NH
 
4
)
 
2
Fe
 
3
(SO
 
4
)
 
4
(OH)
 
3
 · 3H
 
2
O
7.DF.60Arzrunite
Cu
 
4
Pb
 
2
(SO
 
4
)(OH)
 
4
Cl
 
6
 · 2H
 
2
O (?)
7.DF.65Elyite
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
 · H
 
2
O
7.DF.70Yecoraite
Fe
3+
3
Bi
 
5
(Te
6+
 
O
 
4
)
 
2
(Te
4+
 
O
 
3
)O
 
9
 · 9H
 
2
O
7.DF.75Riomarinaite
Bi(SO
 
4
)(OH) · H
 
2
O
7.DF.80Dukeite
Bi
3+
24
Cr
6+
8
O
 
57
(OH)
 
6
 · 3H
 
2
O

Other Names for Xocolatlite

Synonyms:
IMA2007-020
Other Languages:

Other Information

Fluorescence in UV light:none observed
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Xocolatlite

Reference List:

- +
Grundler, P. V. , et al. (2008). Xocolatlite, a new tellurate related to kuranakhite: Description and measurement of Te oxidation state by XANES spectroscopy. American Mineralogist 93,1911-1920(2008)

Internet Links for Xocolatlite

Search Engines:
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    • External Links:
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  • Look for Xocolatlite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Xocolatlite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Mexico
     
    • Sonora
      • Mun. de Moctezuma
        • Moctezuma
    		American Mineralogist 93,1911(2008)
    Mineral and/or Locality
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