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Kladnoite

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Formula:
C
 
6
H
 
4
(CO)
 
2
NH
System:MonoclinicColour:yellow, white, colourless


Chemically identical to phthalimide (phthalic acid imide).

Classification of Kladnoite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:9/D.01-30
Nickel-Strunz 10th (pending) edition ID:10.CA.25

10 : ORGANIC COMPOUNDS
C : Miscellaneous Organic Minerals
A : Miscellaneous Organic Minerals
Dana 8th edition ID:50.4.8.1

50 : ORGANIC COMPOUNDS
4 : Miscellaneous
Hey's CIM Ref.:32.10

32 :
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Type Occurrence of Kladnoite

Type Locality:Kladno Mine (Nejedlý I Mine; Zdeněk Nejedlý Mine; Schoeller Mine; Schöller Mine), Libušin, Kladno, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic
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:
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
Maximum Birefringence:δ = 0.254

Chart 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:
C
 
6
H
 
4
(CO)
 
2
NH
Simplified for copy/paste:C6H4(CO)2NH
Essential elements:C, H, N, O
All elements listed in formula:C, H, N, O

Relationship of Kladnoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
10.CA.05Refikite
C
 
20
H
 
32
O
 
2
10.CA.10Flagstaffite
C
 
10
H
 
22
O
 
3
10.CA.15Hoelite
C
 
14
H
 
8
O
 
2
10.CA.20Abelsonite
Ni(C
 
31
H
 
32
N
 
4
)
10.CA.30Guanine
C
 
5
H
 
5
N
 
5
O
10.CA.30Tinnunculite
C
 
10
H
 
12
N
 
8
O
 
8
10.CA.35Urea
CO(NH
 
2
)
 
2
10.CA.40Uricite
C
 
5
H
 
4
N
 
4
O
 
3
Related Minerals - Hey's Index Grouping:

- +
32.1Evenkite
C
 
21
H
 
44
32.2 Fitchtelite
32.3Simonellite
C
 
19
H
 
24
32.4Kratochvílite
C
 
13
H
 
10
32.5Idrialite
C
 
22
H
 
14
32.6Carpathite
C
 
24
H
 
12
32.7Refikite
C
 
20
H
 
32
O
 
2
32.8Flagstaffite
C
 
10
H
 
22
O
 
3
32.9Hoelite
C
 
14
H
 
8
O
 
2
32.11Acetamide
CH
 
3
CONH
 
2
32.12Guanine
C
 
5
H
 
5
N
 
5
O
32.13Urea
CO(NH
 
2
)
 
2
32.14Uricite
C
 
5
H
 
4
N
 
4
O
 
3
32.15Abelsonite
Ni(C
 
31
H
 
32
N
 
4
)

Other Names for Kladnoite

Synonyms:
Phthalimide
Other Languages:
German:Kladnoit
Spanish:Kladnoita

Other Information

Fluorescence in UV light:none
Thermal Behaviour:phthalimide with a purity of at least 99% (w/w) melts at 234 - 236 °C
Health Warning: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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Kladnoite details from Handbook of Mineralogy (PDF)
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  • Localities for Kladnoite

    The 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. ? 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
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