General Karpatite Information
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Chemical Formula: |
C24H12 |
Composition: |
Molecular Weight = 300.36 gm |
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Hydrogen 4.03 % H |
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Carbon 95.97 % C |
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______ |
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100.00 % |
Empirical Formula: |
C24H12 |
IMA Status: |
Valid Species (Pre-IMA) 1955 |
Locality: |
Transcarpatinian Alps, Russia. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Synonym: |
Carpathite |
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Coronene |
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Pendletonite |
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Karpatite Image |
Images:
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Karpatite
Comments: Pale greenish karpatite with minor red cinnabar.
Location: 4th of July mine, New Idria district, San Benito Co., California, USA.
Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Karpatite
Comments: Flat lying sprays of fibrous crystals of yellow karpatite to 2.8 cm in length on siliceous jasperoid with drusy quartz. Lower image taken using SW UV light.
Location: Los Picachos, near Picacho Peak, San Benito County, California, USA.
Scale: 9.3 x 4.5 x 3.5 cm.
© John Veevaert |
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Karpatite Crystallography
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Axial Ratios: |
a:b:c =2.1373:1:3.4108 |
Cell Dimensions: |
a = 10.035, b = 4.695, c = 16.014, Z = 2; beta = 69° V = 704.38 Den(Calc)= 1.42 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c,P 2/c |
X Ray Diffraction: |
By Intensity(I/Io): 7.43(1), 9.5(1), 3.96(0.4), |
Crystal Structure:
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Fawcett J K , Trotter J , Proceedings of the Royal Society of London , A289 (1966) p.366-376, The crystal and molecular structure of coronene, Locality: synthetic
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Physical Properties of Karpatite
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Cleavage: |
[001] Perfect |
Color: |
Yellow, Yellow green, Black. |
Density: |
1.35 |
Diaphaniety: |
Transparent |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Hardness: |
1.5 - Between Talc and Gypsum |
Luminescence: |
Fluorescent. |
Luster: |
Vitreous - Adamantine |
Streak: |
yellow white |
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Optical Properties of Karpatite
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Optical Data: |
Biaxial (+/-), a=1.76-1.78, b=1.78-1.982, g=2.05-2.15, bire=0.2900-0.3700 |
Pleochroism (x): |
colorless. |
Pleochroism (y): |
colorless. |
Pleochroism (z): |
colorless. |
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Calculated Properties of Karpatite
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Electron Density: |
relectron=1.48 gm/cc note: rKarpatite =1.42 gm/cc. |
Fermion Index |
Fermion Index = 0.01056 Boson Index = 0.98944 |
Photoelectric: |
PEKarpatite = 0.15 barns/electron U=PEKarpatite x relectron= 0.22 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Karpatite is Not Radioactive |
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Karpatite Classification
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Dana Class: |
50.3.7.1 (50)Salts of Organic Acids |
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(50.3)(Hydrocarbons) |
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(50.3.7)Dana Group |
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50.3.7.1 Karpatite C24H12 P 21/c,P 2/c 2/m |
Strunz Class: |
IX/B.02-60 IX - Organic compunds |
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IX/B - Nitrogenfree compounds with C and water, ring structures |
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IX/B.02 - Kratochvilite - Flagstaffite series |
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IX/B.02-10 Kratochvilite (C6H4)2CH2 P na21 mm2 |
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IX/B.02-20 Simonellite C19H24 Pnaa 2/m 2/m 2/m |
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IX/B.02-30 Hoelite (C6H4)2(CO)2 P 21/a 2/m |
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IX/B.02-40 Refikite C19H31COOH P 212121 2 2 2 |
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IX/B.02-50 Hartite C20H34 P1 1 |
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IX/B.02-52 Fichtelite C19H34 P 21 2 |
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IX/B.02-55 Dinite* C20H36 P 212121 2 2 2 |
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IX/B.02-60 Karpatite C24H12 P 21/c,P 2/c 2/m |
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IX/B.02-70 Idrialite C22H14 Unk Ortho |
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IX/B.02-75 Ravatite C14H10 P 21 2 |
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IX/B.02-80 Flagstaffite C10H22O3 F dd2 mm2 |
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Other Karpatite Information
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References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Karpatite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (UofA)
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 -École des Mines de Paris
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Print or Cut-and-Paste your Karpatite Specimen Label here :
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Karpatite
C24H12
Dana No: 50.3.7.1 Strunz No: IX/B.02-60
Locality:
Notes:
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