Carpathite
A valid IMA mineral species - grandfathered
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About Carpathite
Formula:
C24H12
structural formula: [(CH)2C2]6 (7 fused benzene rings)
Colour:
Yellow, yellowish brown
Lustre:
Vitreous
Hardness:
1½
Specific Gravity:
1.35 - 1.40
Crystal System:
Monoclinic
Name:
Originally appears in the literature, translated from Russian as karpatite, apparently unclear on the origin of the name. Later appears as carpathite, but there does seem to be an IMA notice of the change. The new name is clearly for the Carpathian mountains. The name pendletonite also occurs in the literature, but was shown to be identical to carpathite
(CNMMN, 1971).
(CNMMN, 1971).
Type Locality:
Chemically identical to coronene, a polycyclic aromatic hydrocarbon (PAH).
Unique Identifiers
Mindat ID:
2162
Long-form identifier:
mindat:1:1:2162:9
GUID
(UUID V4):
(UUID V4):
ed5aa46b-1fe7-4bb8-8922-b52c6c8ac0dc
IMA Classification of Carpathite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1955
Classification of Carpathite
10.BA.30
10 : ORGANIC COMPOUNDS
B : Hydrocarbons
A : Hydrocarbons
10 : ORGANIC COMPOUNDS
B : Hydrocarbons
A : Hydrocarbons
50.3.7.1
50 : ORGANIC COMPOUNDS
3 : Hydrocarbons
50 : ORGANIC COMPOUNDS
3 : Hydrocarbons
32.6
32 : Hydrocarbons, Resins and other Organic Compounds
32 : Hydrocarbons, Resins and other Organic Compounds
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 |
|---|---|---|
| Cpa | 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 Carpathite
Vitreous
Transparency:
Translucent
Colour:
Yellow, yellowish brown
Hardness:
1½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
on {001}, {100}, {201}
on {001}, {100}, {201}
Fracture:
Splintery
Density:
1.35 - 1.40 g/cm3 (Measured) 1.29 g/cm3 (Calculated)
Optical Data of Carpathite
Type:
Biaxial (+/-)
RI values:
nα = 1.760 - 1.780 nβ = 1.977 - 1.982 nγ = 2.050 - 2.150
2V:
Measured: 96° to 115°
Max Birefringence:
δ = 0.290 - 0.370
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v, relatively strong
Chemistry of Carpathite
Mindat Formula:
C24H12
structural formula: [(CH)2C2]6 (7 fused benzene rings)
structural formula: [(CH)2C2]6 (7 fused benzene rings)
Elements listed:
CAS Registry number:
Crystallography of Carpathite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 10.035 Å, b = 4.695 Å, c = 16.014 Å
β = 112°
β = 112°
Ratio:
a:b:c = 2.137 : 1 : 3.411
Unit Cell V:
699.55 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals are acicular, thin tabular parallel to [001], showing {001}, {100}, {201}, many other forms, to 1 cm; typically in bladed groups and fibrous radiating aggregates.
Comment:
sp gr. P21/c or P2/c (synthetic)
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0004412 | Carpathite | Echigo T, Kimata M, Maruoka T (2007) Crystal-chemical and carbon-isotopic characteristics of karpatite (C24H12) from the Picacho Peak Area, San Benito County, California: Evidences for the hydrothermal formation American Mineralogist 92 1262-1269 |  | 2007 | Picacho Peak Area, San Benito County, California, USA | 0 | 293 |
| 0015361 | Carpathite | Fawcett J K, Trotter J (1966) The crystal and molecular structure of coronene Proceedings of the Royal Society of London A289 366-376 | 1966 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.40 Å | (100) |
| 7.52 Å | (80) |
| 7.25 Å | (50) |
| 3.97 Å | (70) |
| 3.52 Å | (90) |
| 3.43 Å | (40) |
| 3.05 Å | (60) |
Comments:
Olenevo, Ukraine.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 14 : Hot springs, geysers, and other subaerial geothermal minerals | |
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 53 : Other minerals with taphonomic origins | <0.4 |
Type Occurrence of Carpathite
Geological Setting of Type Material:
In cavities at the contact of diorite porphyry with argillites.
Associated Minerals at Type Locality:
Reference:
Piotrovsky, G.L. (1955) Karpatite – a new organic mineral from Transcarpathia. Lvovskoe geol. Obshch., Mineralogicheskii Sbornik: 9: 120–127.
Synonyms of Carpathite
Other Language Names for Carpathite
Spanish:Carpathita
Karpatita
Pendletonita
Karpatita
Pendletonita
Common Associates
Associated Minerals Based on Photo Data:
| 34 photos of Carpathite associated with Cinnabar | HgS |
| 29 photos of Carpathite associated with Quartz | SiO2 |
| 21 photos of Carpathite associated with Gold | Au |
| 3 photos of Carpathite associated with Idrialite | C22H14 |
| 3 photos of Carpathite associated with Metacinnabar | HgS |
| 2 photos of Carpathite associated with Chalcedony | SiO2 |
| 2 photos of Carpathite associated with Goethite | α-Fe3+O(OH) |
Related Minerals - Strunz-mindat Grouping
| 10.BA. | Freitalite | C14H10 |
| 10.BA.05 | Fichtelite | C19H34 |
| 10.BA.10 | Branchite | C20H34 |
| 10.BA.15 | Dinite | C20H36 |
| 10.BA.20 | Idrialite | C22H14 |
| 10.BA.25 | Kratochvílite | C13H10 |
| 10.BA.35 | Phylloretine | C18H18 |
| 10.BA.40 | Ravatite | C14H10 |
| 10.BA.45 | Simonellite | C19H24 |
| 10.BA.50 | Evenkite | C21H44 |
| 10.BA.55 | Wampenite | C18H16 |
| 10.BA.60 | Scharizerite |
Fluorescence of Carpathite
Fluoresces sky-blue under LW and SW UV.
Other Information
Notes:
Flammable.
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 Carpathite
mindat.org URL:
https://www.mindat.org/min-2162.html
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Please feel free to link to this page.
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References for Carpathite
Localities for Carpathite
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.
Russia | |
| Pavel.M. Kartashov (n.d.) |
Slovakia | |
| Duda |
| Koděra (1986) |
| Ďuďa |
Ukraine (TL) | |
| American Mineralogist (1957) +1 other reference |
USA | |
| Chuck Trantham specimen |
| Robbins (1994) |
| Van Nostrand Reinholt Press: 343 +4 other references |
Quick NavTopAbout CarpathiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Tamvatnei Hg deposit, Tamvatnei massif, Anadyrsky District, Chukotka Autonomous Okrug, Russia