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Kladnoite

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Formula:
C6H4(CO)2NH
System:
Monoclinic
Colour:
yellow, white, colourless
Chemically identical to phthalimide (phthalic acid imide).

Classification of Kladnoite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
10.CA.25

10 : ORGANIC COMPOUNDS
C : Miscellaneous Organic Minerals
A : Miscellaneous Organic Minerals
50.4.8.1

50 : ORGANIC COMPOUNDS
4 : Miscellaneous
32.10

32 :
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First Recorded Occurrence of Kladnoite

Year of Discovery:
1942

Physical Properties of Kladnoite

Colour:
yellow, white, colourless
Streak:
white
Cleavage:
Distinct/Good

Crystallography of Kladnoite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 22.7Å, b = 7.61Å, c = 3.76Å
β = 91.32°
Ratio:
a:b:c = 2.983 : 1 : 0.494
Unit Cell Volume:
V 649.36 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space group P21/n.
X-Ray Powder Diffraction Data:
d-spacingIntensity
11.4 (18)
6.35 (95)
5.70 (100)
3.74 (14)
3.38 (14)
3.28 (30)
3.13 (14)

Optical Data of Kladnoite

Type:
Biaxial (+)
RI values:
nα = 1.501 nβ = 1.519 nγ = 1.755
Max Birefringence:
δ = 0.254
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively strong

Chemical Properties of Kladnoite

Formula:
C6H4(CO)2NH
Essential elements:
All elements listed in formula:

Relationship of Kladnoite to other Species

10.CA.05RefikiteC20H32O2
10.CA.10FlagstaffiteC10H22O3
10.CA.15HoeliteC14H8O2
10.CA.20AbelsoniteNi(C31H32N4)
10.CA.30GuanineC5H5N5O
10.CA.30TinnunculiteC10H12N8O8
10.CA.35UreaCO(NH2)2
10.CA.40UriciteC5H4N4O3
32.1EvenkiteC21H44
32.2 Fitchtelite
32.3SimonelliteC19H24
32.4KratochvíliteC13H10
32.5IdrialiteC22H14
32.6CarpathiteC24H12
32.7RefikiteC20H32O2
32.8FlagstaffiteC10H22O3
32.9HoeliteC14H8O2
32.11AcetamideCH3CONH2
32.12GuanineC5H5N5O
32.13UreaCO(NH2)2
32.14UriciteC5H4N4O3
32.15AbelsoniteNi(C31H32N4)

Other Names for Kladnoite

Name in Other Languages:
German:Kladnoit
Spanish:Kladnoita

Other Information

Thermal Behaviour:
phthalimide with a purity of at least 99% (w/w) melts at 234 - 236 °C
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 Kladnoite

Reference List:
Rost, R. (1942): Supplements to the mineralogy of the burning (coal) heaps in the region of Kladno. Rozpravy Ceske Akad., 52(25), 4 pp.

American Mineralogist (1946): 31: 605. (abs.)

Mazat, E. (1972) Die Kristallstruktur des Phtalimids (Kladnoite). Acta Crystallographica B28, 415-418 (in German with English abs.).

Jehlička, J. , Žáček, V., Edwards, H.G.M., Shcherbakova, E. and Moroz, T. (2007): Raman spectra of organic compounds kladnoite (C6H4(CO2)NH) and hoelite (C14H8O2) - rare sublimation products crystallising on self-ignited coal heaps. Spectrochimica Acta Part A, 68, 1053-1057.

Internet Links for Kladnoite

Localities for Kladnoite

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.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia 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
Am Min 31 (1946), 605
    • Hradec Králové Region
      • Trutnov (Trautenau)
        • 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.
Russia
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
          • Kopeisk
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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