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Carpathite

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Formula:
C24H12
Colour:
Yellow, yellowish brown
Lustre:
Vitreous
Hardness:
Specific Gravity:
1.35 - 1.40
Crystal System:
Monoclinic
Name:
Name for Carpathian mountains.
Chemically identical to Coronene, a polycyclic aromatic hydrocarbon (PAH).

The name replaces pendletonite (CNMMN, 1971), karpatite and coronene.



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Classification of CarpathiteHide

Approved, 'Grandfathered' (first described prior to 1959)
10.BA.30

10 : ORGANIC COMPOUNDS
B : Hydrocarbons
A : Hydrocarbons
50.3.7.1

50 : ORGANIC COMPOUNDS
3 : Hydrocarbons

Physical Properties of CarpathiteHide

Vitreous
Transparency:
Translucent
Colour:
Yellow, yellowish brown
Hardness:
1½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
on {001}, {100}, {201}
Fracture:
Splintery
Density:
1.35 - 1.40 g/cm3 (Measured)    1.29 g/cm3 (Calculated)

Optical Data of CarpathiteHide

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.
Surface Relief:
Very High
Dispersion:
r > v, relatively strong

Chemical Properties of CarpathiteHide

Formula:
C24H12
CAS Registry number:
191-07-1

CAS Registry numbers are published by the American Chemical Society

Crystallography of CarpathiteHide

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°
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)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.40 (100)
7.52 (80)
7.25 (50)
3.97 (70)
3.52 (90)
3.43 (40)
3.05 (60)
Comments:
Olenevo, Ukraine.

Type Occurrence of CarpathiteHide

Geological Setting of Type Material:
In cavities at the contact of diorite porphyry with argillites.
Associated Minerals at Type Locality:

Synonyms of CarpathiteHide

Other Language Names for CarpathiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cinnabar4 photos of Carpathite associated with Cinnabar on mindat.org.
Quartz3 photos of Carpathite associated with Quartz on mindat.org.
Idrialite3 photos of Carpathite associated with Idrialite on mindat.org.
Metacinnabar3 photos of Carpathite associated with Metacinnabar on mindat.org.
Realgar1 photo of Carpathite associated with Realgar on mindat.org.
Chalcedony1 photo of Carpathite associated with Chalcedony on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

10.BA.05FichteliteC19H34Mon.
10.BA.10HartiteC20H34Tric. 1 : P1
10.BA.15DiniteC20H36Orth. 2 2 2 : P21 21 21
10.BA.20IdrialiteC22H14Orth.
10.BA.25KratochvíliteC13H10Orth.
10.BA.35PhylloretineC18H18Orth.
10.BA.40RavatiteC14H10Mon. 2 : P21
10.BA.45SimonelliteC19H24Orth. mmm (2/m 2/m 2/m) : Pnna
10.BA.50EvenkiteC21H44Orth. mmm (2/m 2/m 2/m) : Pbcm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

32.1EvenkiteC21H44Orth. mmm (2/m 2/m 2/m) : Pbcm
32.2FichteliteC19H34Mon.
32.3SimonelliteC19H24Orth. mmm (2/m 2/m 2/m) : Pnna
32.4KratochvíliteC13H10Orth.
32.5IdrialiteC22H14Orth.
32.7RefikiteC20H32O2Orth. 2 2 2 : P21 21 2
32.8FlagstaffiteC10H22O3Orth.
32.9HoeliteC14H8O2Orth.
32.10KladnoiteC6H4(CO)2NHMon. 2/m
32.11AcetamideCH3CONH2Trig. 3m : R3c
32.12GuanineC5H5N5OMon.
32.13UreaCO(NH2)2Tet. 4 2m : P4 21m
32.14UriciteC5H4N4O3Mon.
32.15AbelsoniteNi(C31H32N4)Tric. 1 : P1

Fluorescence of CarpathiteHide

Fluoresces sky-blue under LW and SW UV.

Other InformationHide

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.

References for CarpathiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Piotrovsky, G.L. (1955): Karpatite – a new organic mineral from Transcarpathia. Lvovskoe geol. Obshch., Mineral. Sbornik, 9, 120–127 (in Russian).
Murdoch, Joseph and Geissman, T.A. (1967) Pendletonite, a new hydrocarbon mineral from California. American Mineralogist: 52: 611-616.
Frank-Kamenetski, V.A., S.K. Filatov & Y.L. Giller (1967), The crystal structure and chemical formula of carpathite (In Russian)(abstract): American Mineralogist (1969): 54: 329.
Murdoch, Joseph and Geissman, TA. (1968) Pendletonite: a correction American Mineralogist: 53: 1061-1062.
American Mineralogist (1979): 64: 655.
Mineralogy and Petrology: 66: 325-332.
Mineralogical Magazine 38 (1971), 103 [CNMMN, Nomenclature].
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.

Internet Links for CarpathiteHide

Localities for CarpathiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia
 
  • Far-Eastern Region
    • Chukotskii Autonomous Okrug
      • Koryakskoe plateau
        • Tamvatnei massif
Pavel M. Kartashov data
Slovakia
 
  • Prešov Region
    • Prešov Co.
      • Červenica
Duda,R. et. all.,1981: MIneralogia severnej časti Slanských vrchov. Min.Slovaca,Monografia 2, Bratislava, 98p
    • Vranov nad Topľou Co.
      • Juskova Voľa
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Ďuďa,R., Kaličiaková,E., 1987: Mineralogicko – paragenetické pomery Hg ložiska Merník. Min.Slovaca, 19,5,423 – 442
Ukraine (TL)
 
  • Zakarpats'ka Oblast' (Transcarpathian Oblasť; Zakarpattia)
    • Svalyavskyi Raion
American Mineralogist (1957), 42, 120 ; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
USA
 
  • California
    • San Benito Co.
      • Diablo Range
        • New Idria District
Chuck Trantham specimen
          • Picacho Peak
            • Clear Creek area
              • Hernandez
                • Flint group (Boston; Fourth of July; Monterey; Andy Johnson claim; Red Rock; Clear Creek)
Manuel Robbins (1994) Fluorescence: Gems and Minerals Under Ultraviolet Light. Geoscience Press.
Murdoch, Joseph and Geissman, T.A. (1967) Pendletonite, a new hydrocarbon mineral from California. American Mineralogist: 52: 611-616; Murdoch, Joseph and Geissman, TA. (1968) Pendletonite: a correction American Mineralogist: 53: 1061-1062; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 343; 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.
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