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Carpathite

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About CarpathiteHide

Formula:
C24H12
structural formula: [(CH)2C2]6 (7 fused benzene rings)
Colour:
Yellow, yellowish brown
Lustre:
Vitreous
Hardness:
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).
Chemically identical to coronene, a polycyclic aromatic hydrocarbon (PAH).



Classification of CarpathiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1955
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

structural formula: [(CH)2C2]6 (7 fused benzene rings)
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 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.

Type Occurrence of CarpathiteHide

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 CarpathiteHide

Other Language Names for CarpathiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Carpathite associated with CinnabarHgS
3 photos of Carpathite associated with QuartzSiO2
3 photos of Carpathite associated with IdrialiteC22H14
3 photos of Carpathite associated with MetacinnabarHgS
1 photo of Carpathite associated with RealgarAs4S4
1 photo of Carpathite associated with ChalcedonySiO2

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., Mineralogicheskii Sbornik: 9: 120–127. (in Russian)
Fleischer, M. (1957) New mineral names. American Mineralogist: 42: 117-124.
Fawcett, J.K., Trotter, J. (1966) The crystal and molecular structure of coronene. Proceedings of the Royal Society of London: A289: 366-376.
Murdoch, Joseph and Geissman, T.A. (1967) Pendletonite, a new hydrocarbon mineral from California. American Mineralogist: 52: 611-616.
Frank-Kamenetski, V.A., Filatov, S.K., Giller, Y.L. (1967) The crystal structure and chemical formula of carpathite. Mineral. Sbornik L'vov Gos. Univ.: 2l: 275-278. (in Russian)
Fleischer, M. (1969) New mineral names. American Mineralogist: 54: 326-330 (329).
Murdoch, Joseph and Geissman, T.A. (1968) Pendletonite: a correction American Mineralogist: 53: 1061-1062.
International Mineralogical Association (1971) International Mineralogical Association: Commission on new minerals and mineral names. Mineralogical Magazine: 38: 102-105 (103).
Blumer, M. (1975) Curtisite, idrialite and pendletonite, polycyclic aromatic hydrocarbon minerals: Their composition and origin. Chemical Geology: 16(4): 245-256.
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.
Potticary, J., Jensen, T.T., Hall, S.R. (2017) Nanostructural origin of blue fluorescence in the mineral karpatite. Scientific Reports: 7: 9867.

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
 
  • Chukotka Autonomous Okrug
    • Koryakskoe plateau
      • Tamvatnei massif
Pavel M. Kartashov data
Slovakia
 
  • Prešov Region
    • Prešov District
      • Červenica
Duda,R. et. all.,1981: MIneralogia severnej časti Slanských vrchov. Min.Slovaca,Monografia 2, Bratislava, 98p
    • Vranov nad Topľou District
      • 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)
 
  • Zakarpattia Oblast
    • Svaliava 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.
      • New Idria Mining District
Chuck Trantham specimen
        • Picacho Peak
          • Flint group (Boston; Fourth of July Mine; 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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