Karpatite Mineral Data

Karpatite Mineral Data +

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General Karpatite Information

Chemical Formula:

C24H12

Composition:

Molecular Weight = 300.36 gm

Hydrogen 4.03 % H

Carbon 95.97 % C

______

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

Coronene

Pendletonite

Karpatite Image

Images:

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

Images:

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

Karpatite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Physical Properties of Karpatite

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

Optical Properties of Karpatite

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.

Calculated Properties of Karpatite

Electron Density:

r_electron=1.48 gm/cc
note: r_Karpatite=1.42 gm/cc.

Fermion Index

Fermion Index = 0.01056
Boson Index = 0.98944

Photoelectric:

PE_Karpatite= 0.15 barns/electron
U=PE_Karpatite x r_electron= 0.22 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Karpatite is Not Radioactive

Karpatite Classification

Dana Class:

50.3.7.1 (50)Salts of Organic Acids

(50.3)(Hydrocarbons)

(50.3.7)Dana Group

50.3.7.1 Karpatite C24H12 P 2₁/c,P 2/c 2/m

Strunz Class:

IX/B.02-60 IX - Organic compunds

IX/B - Nitrogenfree compounds with C and water, ring structures

IX/B.02 - Kratochvilite - Flagstaffite series

IX/B.02-10 Kratochvilite (C6H4)2CH2 P na2₁ mm2

IX/B.02-20 Simonellite C19H24 Pnaa 2/m 2/m 2/m

IX/B.02-30 Hoelite (C6H4)2(CO)2 P 2₁/a 2/m

IX/B.02-40 Refikite C19H31COOH P 2₁2₁2₁ 2 2 2

IX/B.02-50 Hartite C20H34 P1 1

IX/B.02-52 Fichtelite C19H34 P 2₁ 2

IX/B.02-55 Dinite* C20H36 P 2₁2₁2₁ 2 2 2

IX/B.02-60 Karpatite C24H12 P 2₁/c,P 2/c 2/m

IX/B.02-70 Idrialite C22H14 Unk Ortho

IX/B.02-75 Ravatite C14H10 P 2₁ 2

IX/B.02-80 Flagstaffite C10H22O3 F dd2 mm2

Other Karpatite Information

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 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Karpatite

C24H12
Dana No: 50.3.7.1 Strunz No: IX/B.02-60
Locality:

Notes: