Tlapallite Mineral Data
General Tlapallite Information
Chemical Formula:
H6(Ca,Pb)2Cu3(SO4)(Te++++O3)4(Te++++++O6)
Composition:
Molecular Weight = 1,382.46 gm
Calcium 4.35 % Ca 6.08 % CaO
Copper 13.79 % Cu 17.26 % CuO
Tellurium 46.15 % Te 57.72 % TeO2
Hydrogen 0.44 % H 3.91 % H2 O
Lead 7.49 % Pb 8.07 % PbO
Sulfur 2.32 % S 5.79 % SO3
Oxygen 25.46 % O
______ ______
100.00 % 98.84 % = TOTAL OXIDE
Empirical Formula:
H6 Ca1.5 Pb0.5 Cu3 (SO4 )(TeO3 )4 (TeO6 )
IMA Status:
Approved IMA 1978
Locality:
Bambollita mine ("La Oriental"), Moctezuma, Sonora, Mexico. Link to MinDat.org Location Data.
Name Origin:
Named from the Nahua "tlapalli," paint, in allusion to its paintlike coating of rock surfaces.
Name Pronunciation:
Tlapallite + Pronunciation
Tlapallite Image
Images:
Tlapallite
Comments: Green, microcrystalline druse of tlapallite grains.
Location: Bambollita Mine (Oriental Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico.
Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag
Tlapallite Crystallography
Axial Ratios:
a:b:c =1.3139:1:1.7189
Cell Dimensions:
a = 11.97, b = 9.11, c = 15.66, Z = 4; beta = 90.04° V = 1,707.67 Den(Calc)= 5.38
Crystal System:
Monoclinic Space Group: Unk
X Ray Diffraction:
By Intensity(I/Io ): 2.985(1), 11.972(1), 3.54(0.6),
Physical Properties of Tlapallite
Cleavage:
None
Color:
Green, Cyprus green.
Density:
4.65
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Thin - Flat dimensioned crystals.
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Optical Properties of Tlapallite
Gladstone-Dale:
CI meas = -0.095 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = 0.053 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1822,KPDmeas = 0.2108,KC = 0.1924 Ncalc = 1.89 - 2.04
Optical Data:
Biaxial (-), a=1.815-1.915, b=1.96-2.115, g=1.96-2.115, bire=0.1450-0.2000, 2V(Calc)=0, 2V(Meas)=small.
Calculated Properties of Tlapallite
Electron Density:
Bulk Density (Electron Density)=4.79 gm/cc note: Specific Gravity of Tlapallite =5.38 gm/cc.
Fermion Index:
Fermion Index = 0.05 Boson Index = 0.95
Photoelectric:
PETlapallite = 295.27 barns/electronU=PETlapallite x r Electron Density=1,415.66 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tlapallite is Not Radioactive
Tlapallite Classification
Dana Class:
34.08.02.01 (34) Selenites - Tellurites - Sulfites
(34.08) Dana Type
(34.08.02) Dana Group
34.08.02.01 Tlapallite H6(Ca,Pb)2Cu3(SO4)(TeO3)4(TeO6) Unk Mono
Strunz Class:
04.JL.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
04.JL -Tellurites with additional anions, without H2O
04.JL.25 Tlapallite H6(Ca,Pb)2Cu3(SO4)(TeO3)4(TeO6) Unk Mono
Other Tlapallite Information
References:
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Tlapallite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Tlapallite
H6(Ca,Pb)2Cu3(SO4)(Te++++O3)4(Te++++++O6)
Dana No: 34.08.02.01 Strunz No: 04.JL.25
Locality:
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