Evenkite Mineral Data

Evenkite Mineral Data +

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General Evenkite Information

Chemical Formula:

(CH3)2(CH2)22

Composition:

Molecular Weight = 338.66 gm

Hydrogen 14.88 % H

Carbon 85.12 % C

______

100.00 %

Empirical Formula:

C₂₄H₅₀

Environment:

In vugs in a quartz vein cutting vesicular lava.

IMA Status:

Valid Species (Pre-IMA) 1953

Locality:

Evenki Region, Lower Tunguska River, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Names after its locality

Synonym:

n-tetracosane

Evenkite Image

Images:

Evenkite

Comments: Colorless flake of evenkite on an orange background.
Location: Khavokiperskiye Rocks polymetallic occurrence, Evenkia, Nizhnyaya Tunguska River, Nizhnyaya Tunguska River Basin, Krasnoyarskiy Kray, Eastern-Siberian Region, Russia. Scale: Size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Evenkite Crystallography

Axial Ratios:

a:b:c =1.524:1:6.7871

Cell Dimensions:

a = 7.59, b = 4.98, c = 33.8, Z = 2; beta = 92.25° V = 1,276.59 Den(Calc)= 0.88

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 4.18(1), 3.74(0.9), 2.25(0.8),

Physical Properties of Evenkite

Cleavage:

[001] Perfect

Color:

Colorless, Yellowish green, White, Yellowish white.

Density:

0.87

Diaphaniety:

Transparent

Habit:

Disseminated - Occurs in small, distinct particles dispersed in matrix.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

1 - Talc

Luster:

Waxy

Streak:

white

Optical Properties of Evenkite

Optical Data:

Biaxial (+), a=1.504, b=1.504, g=1.553, bire=0.0490

Calculated Properties of Evenkite

Electron Density:

r_electron=1.01 gm/cc
note: r_Evenkite=0.88 gm/cc.

Fermion Index

Fermion Index = 0.00938
Boson Index = 0.99062

Photoelectric:

PE_Evenkite= 0.12 barns/electron
U=PE_Evenkite x r_electron= 0.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Evenkite is Not Radioactive

Evenkite Classification

Dana Class:

50.3.6.1 (50)Salts of Organic Acids

(50.3)(Hydrocarbons)

(50.3.6)Dana Group

50.3.6.1 Evenkite (CH3)2(CH2)22 P 2₁/a 2/m

Strunz Class:

IX/B.01-10 IX - Organic compunds

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

IX/B.01 - Evenkite series

IX/B.01-10 Evenkite (CH3)2(CH2)22 P 2₁/a 2/m

Other Evenkite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Evenkite :
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 Evenkite Specimen Label here :

Evenkite

(CH3)2(CH2)22
Dana No: 50.3.6.1 Strunz No: IX/B.01-10
Locality:

Notes: