Mineralogy Database

Esseneite Mineral Data

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General Esseneite Information

Help on Chemical  Formula: Chemical Formula: CaFe+++AlSiO6
Help on Composition: Composition: Molecular Weight = 246.99 gm
   Calcium   16.23 %  Ca   22.70 % CaO
   Aluminum  10.92 %  Al   20.64 % Al2O3
   Iron      22.61 %  Fe   32.33 % Fe2O3
   Silicon   11.37 %  Si   24.33 % SiO2
   Oxygen    38.87 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaFe3+AlSiO6
Help on Environment: Environment: A high-temperature, low-pressure, oxidized and quenched crystallization product derived from fused sediments contiguous to naturally combusted coal seams.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: At Durham ranch, in the Powder River basin, 13 km northeast of Reno Junction and 25 km south of Gillette, Campbell Co., Wyoming, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Eric J. Essene, Professor at the University of Michigan, Ann Arbor, Michigan, USA, and discoverer of the first specimens.
Help on Name Pronunciation: Name Pronunciation: Esseneite + Pronunciation Say ESSENEITE
Help on Synonym: Synonym: ICSD 202160
  PDF 31-305

Esseneite Image

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Comments: Orange-brown crystalline coating of esseneite on anorthite.
Location: Kopeisk, Chelyabinsk District, Southern Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Esseneite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1097:1:0.6087
Help on Cell Dimensions: Cell Dimensions: a = 9.79, b = 8.822, c = 5.37, Z = 4; beta = 105.81° V = 446.25 Den(Calc)= 3.68
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1), 2.526(0.7), 2.96(0.6),

Physical Properties of Esseneite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Reddish brown.
Help on Density: Density: 3.54
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Esseneite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.092 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2206,KPDmeas= 0.2293,KC= 0.2428
Ncalc = 1.86 - 1.89
Help on Optical Data: Optical Data: Biaxial (-), a=1.795, b=1.815, g=1.825, bire=0.0300, 2V(Calc)=68, 2V(Meas)=77.

Calculated Properties of Esseneite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Esseneite =3.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEEsseneite = 9.50 barns/electron
U=PEEsseneite x rElectron Density= 32.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Esseneite is Not Radioactive

Esseneite Classification

Help on  Dana Class: Dana Class: 65.01.03a.06 (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.01)with chains P=2
  (65.01.03a)C2/c clinopyroxenes (Ca clinopyroxenes)
65.01.03a.01 Diopside CaMgSi2O6 C 2/c 2/m
65.01.03a.02 Hedenbergite CaFeSi2O6 C 2/c 2/m
65.01.03a.03 Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 C 2/c 2/m
65.01.03a.04 Johannsenite CaMnSi2O6 C 2/c 2/m
65.01.03a.05 Petedunnite Ca(Zn,Mn,Fe,Mg)Si2O6 C 2/c 2/m
65.01.03a.06 Esseneite CaFeAlSiO6 C 2/c 2/m
65.01.03a.07 Davisite! Ca(Sc,Ti,Mg,Ti)AlSiO6 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.DA.15 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DA -Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
09.DA.15 Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 C 2/c 2/m
09.DA.15 Esseneite CaFeAlSiO6 C 2/c 2/m
09.DA.15 Diopside CaMgSi2O6 C 2/c 2/m
09.DA.15 Johannsenite CaMnSi2O6 C 2/c 2/m
09.DA.15 Hedenbergite CaFeSi2O6 C 2/c 2/m
09.DA.15 Petedunnite Ca(Zn,Mn,Fe,Mg)Si2O6 C 2/c 2/m
09.DA.15 Davisite! Ca(Sc,Ti,Mg,Ti)AlSiO6 C 2/c 2/m

Other Esseneite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.72,p148-156,1987) OPTIC PROP.(Am.Min.,Vol.72,p148-156,1987)
Help on See Also: See Also: Links to other databases for Esseneite :
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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Dana No: 65.01.03a.06 Strunz No: 09.DA.15





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