Evenkite Mineral Data

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

Name Pronunciation:

Evenkite

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 =1.5:1:13.2228

Cell Dimensions:

a = 7.47, b = 4.98, c = 65.85, Z = 4; V = 2,449.66 Den(Calc)= 0.92

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbcm

$Help on X Ray Diffraction:$ 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

Diaphaneity:

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:

Bulk Density (Electron Density)=1.05 gm/cc
note: Specific Gravity of Evenkite =0.92 gm/cc.

Fermion Index:

Fermion Index = 0.0093853841
Boson Index = 0.9906146159

Photoelectric:

PE_Evenkite= 0.12 barns/electron
U=PE_Evenkite x rElectron Density= 0.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Evenkite is Not Radioactive

Evenkite Classification

Dana Class:

50.03.06.01 (50)Salts of Organic Acids

(50.03)(Hydrocarbons)

(50.03.06)Dana Group

50.03.06.01 Evenkite (CH3)2(CH2)22 Pbcm 2/m 2/m 2/m

Strunz Class:

10.BA.50 10 - ORGANIC COMPOUNDS

10.B - Hydrocarbons

10.BA -Hydrocarbons

10.BA.50 Evenkite (CH3)2(CH2)22 Pbcm 2/m 2/m 2/m

Other Evenkite Information

References:

NAME( Dana8) PHYS. PROP.(AmMin, v90, p1468) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Evenkite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Evenkite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Evenkite Specimen Label here :

Evenkite

(CH3)2(CH2)22
Dana No: 50.03.06.01 Strunz No: 10.BA.50
Locality:

Notes: