Cotunnite (original) (raw)
A valid IMA mineral species - grandfathered
About CotunniteHide
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Colour:
Colourless, white, light yellow, light green
Lustre:
Adamantine, Silky, Pearly
Crystal System:
Orthorhombic
Name:
Named in honor of Domenico Cotugno (29 January 1736, Ruvo di Puglia, Italy - 6 October 1822, Naples, Italy), Professor of Anatomy, University of Naples.
In the experimental volcanic gas condensation by Africano et al. (2002) it deposits below 325°C.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1141:5
f5ba73b1-4666-4b01-856f-07cb6523aaa5
IMA Classification of CotunniteHide
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Approved, 'Grandfathered' (first described prior to 1959)
Type description reference:
Classification of CotunniteHide
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3.AB.85
3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
9.2.7.1
9 : NORMAL HALIDES
2 : AX2
8.8.4
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
8 : Halides of Pb
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Cot | 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 CotunniteHide
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Adamantine, Silky, Pearly
Transparency:
Transparent, Translucent
Colour:
Colourless, white, light yellow, light green
Cleavage:
Perfect
On {010}.
Density:
5.8 g/cm3 (Measured) 5.81 g/cm3 (Calculated)
Optical Data of CotunniteHide
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RI values:
_n_α = 2.199 _n_β = 2.217 _n_γ = 2.260
2V:
Measured: 67° , Calculated: 68°
δ = 0.061
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
relatively strong
Chemistry of CotunniteHide
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Crystallography of CotunniteHide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 7.6222(5) Å, b = 9.0448(7) Å, c = 4.5348(4) Å
Ratio:
a:b:c = 0.843 : 1 : 0.501
Unit Cell V:
312.63 ų (Calculated from Unit Cell)
Morphology:
Usually flattened {010} and elongated [001]. Doubly terminated with equivalent faces unequally developed. Reentrant angles may be present in the prism zone due to oscillatory combination of {210} and {110}. Massive, granular.
Twinning:
On {120} (artificial crystals).
Comment:
Space group Pnam (non-standard setting)
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0011874 | Cotunnite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 298-306 | 1963 | 0 | 293 |
CIF Raw Data - click here to close
Epitaxial Relationships of CotunniteHide
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X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.057 Å | (35) |
| 3.890 Å | (75) |
| 3.810 Å | (40) |
| 3.579 Å | (100) |
| 2.776 Å | (55) |
| 2.510 Å | (45) |
| 2.096 Å | (40) |
Geological EnvironmentHide
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Geological Setting:
Alteration product of galena under arid, saline conditions.
Type Occurrence of CotunniteHide
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Reference:
Monticelli, T., Covelli, N. (1825) Cotunnia (Piombo muriato). Prodromo della Mineralogia Vesuviana, Napoli: 1: 47-52.
Synonyms of CotunniteHide
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Other Language Names for CotunniteHide
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Simplified Chinese:氯铅矿
Traditional Chinese:氯鉛礦
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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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 CotunniteHide
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References for CotunniteHide
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Reference List:
Localities for CotunniteHide
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This 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.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.