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Carpathite

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Formula:
C24H12
System:
Monoclinic
Colour:
Yellow, yellowish brown
Hardness:
Name:
Name for Carpathian mountains.
Chemically identical to Coronene, a polycyclic aromatic hydrocarbon (PAH).

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

Classification of Carpathite

Approved
10.BA.30

10 : ORGANIC COMPOUNDS
B : Hydrocarbons
A : Hydrocarbons
50.3.7.1

50 : ORGANIC COMPOUNDS
3 : Hydrocarbons
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Type Occurrence of Carpathite

Year of Discovery:
1955
Geological Setting of Type Material:
In cavities at the contact of diorite porphyry with argillites.
Associated Minerals at Type Locality:

Physical Properties of Carpathite

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

Crystallography of Carpathite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P21/c
Cell Parameters:
a = 10.035Å, b = 4.695Å, c = 16.014Å
β = 112°
Ratio:
a:b:c = 2.137 : 1 : 3.411
Unit Cell Volume:
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 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.

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

Chemical Properties of Carpathite

Formula:
C24H12
Essential elements:
All elements listed in formula:
CAS Registry number:
191-07-1

CAS Registry numbers are published by the American Chemical Society
Analytical Data:
Olenevo, Ukraine.
C (96.04)
H (4.04)
Total (100.08)

Relationship of Carpathite to other Species

10.BA.05FichteliteC19H34
10.BA.10HartiteC20H34
10.BA.15DiniteC20H36
10.BA.20IdrialiteC22H14
10.BA.25KratochvíliteC13H10
10.BA.30Karpatite
10.BA.35PhylloretineC18H18
10.BA.40RavatiteC14H10
10.BA.45SimonelliteC19H24
10.BA.50EvenkiteC21H44
32.1EvenkiteC21H44
32.2 Fitchtelite
32.3SimonelliteC19H24
32.4KratochvíliteC13H10
32.5IdrialiteC22H14
32.7RefikiteC20H32O2
32.8FlagstaffiteC10H22O3
32.9HoeliteC14H8O2
32.10KladnoiteC6H4(CO)2NH
32.11AcetamideCH3CONH2
32.12GuanineC5H5N5O
32.13UreaCO(NH2)2
32.14UriciteC5H4N4O3
32.15AbelsoniteNi(C31H32N4)

Other Names for Carpathite

Other Information

Fluoresces sky-blue under LW and SW UV.
Other Information:
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 Carpathite

Reference List:
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 Carpathite

Localities for Carpathite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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.
Mineral and/or Locality  
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