SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About KratochvíliteHide

Josef Kratochvíl
Specific Gravity:
Crystal System:
To honor Josef Kratochvíl (28 July 1878, Caslav, Czech Republic - 1 November 1958, Prague, Czech Republic), petrographer and professor, Charles University, Prague, Czech Republic. He wrote the eight-volume work, 'The Topographic Mineralogy of Bohemia'.
Organic compound formed in burning pyritic shale or coal fires. It is uncertain whether kratochvíllite is the chemical fluorene (more specifically: 9H-fluorene) (C13H10) or anthracene (C14H10) - further study of type material needed.

Note (04.04.2020): seems like it is fluorene, as "anthracene" is now approved as freitalite.

Both compounds are well-known polycyclic aromatic hydrocarbons (PAHs), and their structural formulas are (CH)4C2(CH2)C2(CH)4 (also known as tricyclo[,7]trideca-2,4,6,9,11,13-hexaene, that is, two benzene rings fused with a single cyclopentane one) and (CH)4C2(CH)2C2(CH4)4 (also known as tricyclo[,8]tetradeca-1,3,5,7,9,11,13-heptaene, i.e., three benzene rings fused), respectively.

Classification of KratochvíliteHide

Approved, 'Grandfathered' (first described prior to 1959)

B : Hydrocarbons
A : Hydrocarbons

3 : Hydrocarbons

Physical Properties of KratochvíliteHide

Colorless, white
1.206 g/cm3 (Measured)    1.197 g/cm3 (Calculated)

Optical Data of KratochvíliteHide

Biaxial (+)
RI values:
nα = 1.578 nβ = 1.663 nγ = 1.919
Max Birefringence:
δ = 0.341
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
very weak

Chemical Properties of KratochvíliteHide


Crystallography of KratochvíliteHide

Crystal System:
Cell Parameters:
a = 8.47 Å, b = 5.7 Å, c = 18.87 Å
a:b:c = 1.486 : 1 : 3.311
Unit Cell V:
911.02 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.68 Å(100b)
9.39 Å(70)
4.21 Å(70b)
3.79 Å(50)
3.38 Å(90)
2.54 Å(60)
2.45 Å(50)
Data for synthetic C13H10.

Type Occurrence of KratochvíliteHide

Synonyms of KratochvíliteHide

Other Language Names for KratochvíliteHide

Related Minerals - Nickel-Strunz GroupingHide

10.BA.10HartiteC20H34Tric. 1 : P1
10.BA.15DiniteC20H36Orth. 2 2 2 : P21 21 21
10.BA.30CarpathiteC24H12Mon. 2/m : P21/b
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
32.3SimonelliteC19H24Orth. mmm (2/m 2/m 2/m) : Pnna
32.6CarpathiteC24H12Mon. 2/m : P21/b
32.7RefikiteC20H32O2Orth. 2 2 2 : P21 21 2
32.10KladnoiteC6H4(CO)2NHMon. 2/m
32.11AcetamideCH3CONH2Trig. 3m : R3c
32.13UreaCO(NH2)2Tet. 4 2m : P4 21m
32.15AbelsoniteNi(C31H32N4)Tric. 1 : P1

Fluorescence of KratochvíliteHide

SW UV: Bright blue-violet.

Other InformationHide

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 KratochvíliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rost, R. (1937) The minerals of the burning coal heaps in the vicinity of Kladno. Rozpravy Ceske Akademie: Kl II: 47(11): 6 pp.
Foshag, W.F. (1938) New mineral names. American Mineralogist: 23: 666-668.
Brown, G.M., Bortner, M.H. (1954) On the crystal and molecular structure of fluorene. Acta Crystallographica: 7: 139.
Burns, D.M., Iball, J. (1955) The crystal and molecular structure of fluorene. Proceedings of the Royal Society of London: 227: 200-214.
Bree, A., Zwarich, R. (1969) Vibrational assignment of fluorene from the infrared and Raman spectra. The Journal of Chemical Physics: 51: 912-920.
Gerkin, R.E., Lundstedt, A.P., Reppart, W.J. (1984) Structure of fluorene, C13H10, at 159 K. Acta Crystallographica: C40: 1892-1894.
Witzke, T. (1995) Kratochvilit, C13H10 oder C14H10?, Mineralien-Welt: 6(4): 25. (in German)

Internet Links for KratochvíliteHide

Localities for KratochvíliteHide

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.
Czech Republic
  • Central Bohemian Region
Zacek, V., Oplustil, S., Mayova, A. & Meyer, F. R. (1995): Die Mineralien von Kladno in Mittelböhmen, Tschechische Republik. Mineralien-Welt 6 (1), 13-30 (in German).
      • Libušin
American Mineralogist (1938): 23: 667.
  • Hradec Králové Region
    • Trutnov District
      • Radvanice
Žáček, V., Ondruš, P.: Mineralogy of recently formed sublimates from Kateřina colliery in Radvanice, Eastern Bohemia, Czech Republic. Bulletin of the Czech geological survey, 1998, vol. 73, no. 2, s. 289-302.
  • North Rhine-Westphalia
    • Cologne
      • Aachen
        • Alsdorf
Witzke, T., de Wit, F., Kolitsch, U. and Blaß, G. (2015): Mineralogy of the Burning Anna I Coal Mine Dump, Alsdorf, Germany. Chapter 7, pp. 203-240, in: Stracher, G. B., Prakash, A. and Sokol, E. V.: Coal and Peat Fires: A Global Perspective, Volume 3: Case Studies - Coal Fires, Elsevier, 786 pp.
  • Silesian Voivodeship
    • Katowice City County
      • Wełnowiec
Fabiańska, M., Ciesielczuk, J., Misz-Kennan, M., Kruszewski, Ł. (2015): Rare organic minerals on self-heating coal waste dumps - the Wełnowiec case. Mineralogia Special Papers: 44: 116
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 25, 2020 19:49:30 Page generated: November 24, 2020 13:31:30
Go to top of page