Cuzticite
A valid IMA mineral species
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About Cuzticite
Formula:
Fe3+2(TeO6) · 3H2O
Colour:
Deep yellow, also golden brown to brown
Lustre:
Sub-Vitreous, Greasy, Pearly
Hardness:
3
Specific Gravity:
3.9
Crystal System:
Hexagonal
Name:
Named in 1982 from the Nahuatl language for "something yellow" referring to the yellow to brown color of the original mineral.
This page provides mineralogical data about Cuzticite.
Unique Identifiers
Mindat ID:
1199
Long-form identifier:
mindat:1:1:1199:6
IMA Classification of Cuzticite
Approved
IMA Formula:
Fe3+2Te6+O6·3H2O
Approval year:
1980
Classification of Cuzticite
4.FM.35
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
M : Hydroxides with H2O +- (OH); unclassified
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
M : Hydroxides with H2O +- (OH); unclassified
Dana 7th ed.:
33.2.3.1
33.2.3.1
33 : SELENATES AND TELLURATES
2 : (AB)m(XO6)·xH2O, where x can equal zero
33 : SELENATES AND TELLURATES
2 : (AB)m(XO6)·xH2O, where x can equal zero
28.4.16
28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Cuz | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cuzticite
Sub-Vitreous, Greasy, Pearly
Transparency:
Transparent, Translucent
Comment:
May be very bright or reflective
Colour:
Deep yellow, also golden brown to brown
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.9 g/cm3 (Measured) 4.01 g/cm3 (Calculated)
Optical Data of Cuzticite
Type:
Uniaxial (-)
RI values:
nω = 2.06 nε = 2.05
Birefringence:
0.01
Max. Birefringence:
δ = 0.010
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Optical Extinction:
Parallel
Pleochroism:
Non-pleochroic
Chemistry of Cuzticite
Mindat Formula:
Fe3+2(TeO6) · 3H2O
Element Weights:
Elements listed:
Crystallography of Cuzticite
Crystal System:
Hexagonal
Cell Parameters:
a = 5.045 Å, c = 14.63 Å
Ratio:
a:c = 1 : 2.9
Unit Cell V:
322.48 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Scaly coatings
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.87 Å | (40) |
| 3.26 Å | (100) |
| 2.52 Å | (70) |
| 2.24 Å | (30) |
| 1.99 Å | (20) |
| 1.75 Å | (20) |
| 1.56 Å | (30) |
| 1.46 Å | (30) |
Comments:
35-664
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Cuzticite
General Appearance of Type Material:
Yellow to brownish yellow scaly coatings.
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1984,467
Associated Minerals at Type Locality:
Synonyms of Cuzticite
Other Language Names for Cuzticite
Common Associates
Associations Based on Photo Data:
| 5 photos of Cuzticite associated with Zemannite | Mg0.5ZnFe3+(Te4+O3)3 · 4.5H2O |
| 4 photos of Cuzticite associated with Emmonsite | Fe3+2(TeO3)3 · 2H2O |
| 4 photos of Cuzticite associated with Quartz | SiO2 |
| 4 photos of Cuzticite associated with Eztlite | Pb2+2Fe3+3(Te4+ O3)3(SO4)O2Cl |
| 2 photos of Cuzticite associated with Goldfieldite | (Cu4◻2)(Cu4Cu+2)Te4S12S |
| 1 photo of Cuzticite associated with Burckhardtite | Pb2(Fe3+Te6+)[AlSi3O8]O6 |
| 1 photo of Cuzticite associated with Baryte | BaSO4 |
| 1 photo of Cuzticite associated with Tellurite | TeO2 |
Related Minerals - Strunz-mindat Grouping
| 4.FM. | Charleshatchettite | CaNb4O10(OH)2 · 8H2O |
| 4.FM.15 | Franconite | Na(Nb2O5)(OH) · 3H2O |
| 4.FM.15 | Hochelagaite | (Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O |
| 4.FM.15 | Ternovite | (Mg,Ca)Nb4O11 · nH2O |
| 4.FM.25 | Belyankinite | Ca1-2(Ti,Zr,Nb)5O12 · 9H2O (?) |
| 4.FM.25 | Gerasimovskite | Mn2+(Nb,Ti)5O12 · 9H2O (?) |
| 4.FM.25 | Manganbelyankinite | Mn2+(Ti,Nb)5O12 · 9H2O |
| 4.FM.30 | Silhydrite | Si3O6 · H2O |
| 4.FM.50 | Qatranaite | CaZn2(OH)6(H2O)2 |
| 4.FM.55 | 'Hydroplumbite' | 3PbO · H2O |
Fluorescence of Cuzticite
Not fluorescent
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Cuzticite
mindat.org URL:
https://www.mindat.org/min-1199.html
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Please feel free to link to this page.
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References for Cuzticite
Localities for Cuzticite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Mexico (TL) | |
| Williams (1982) +1 other reference |
Russia | |
| Pavel M. Kartashov (n.d.) |
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Moctezuma Mine, Moctezuma, Moctezuma Municipality, Sonora, Mexico