Mineralogy Database

Ellenbergerite Mineral Data

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General Ellenbergerite Information

Help on Chemical  Formula: Chemical Formula: Mg6TiAl6Si8O28(OH)10
Help on Composition: Composition: Molecular Weight = 1,198.34 gm
   Magnesium  12.17 %  Mg   20.18 % MgO
   Titanium    4.00 %  Ti    6.67 % TiO2
   Aluminum   13.51 %  Al   25.53 % Al2O3
   Silicon    18.75 %  Si   40.11 % SiO2
   Hydrogen    0.84 %  H     7.52 % H2O
   Oxygen     50.73 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg6TiAl6Si8O28(OH)10
Help on Environment: Environment: As inclusions in pyrope porphyroblasts developed during high-pressure (25-30 kbar), medium-temperature (700 �C{800 �C) metamorphism of continental crustal rocks.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Dora-Maira massif, Parigi, near Martiniana Po, Piedmont, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Francois Ellenberger, Paris, France, for his geological work in the western Alps.
Help on Name Pronunciation: Name Pronunciation: Ellenbergerite + Pronunciation Say ELLENBERGERITE
Help on Synonym: Synonym: ICSD 66681
  PDF 40-507

Ellenbergerite Image

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Comments: Pale pink glassy nearly pure mass of ellenbergerite.
Location: Dora-Meira Massif, Parigi, Piemonte, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ellenbergerite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.40244
Help on Cell Dimensions: Cell Dimensions: a = 12.255, c = 4.932, Z = 1; V = 641.48 Den(Calc)= 3.10
Help on Crystal System: Crystal System: Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.54(0.75), 2.653(0.7), 3.06(0.55),

Physical Properties of Ellenbergerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Purple, Lilac.
Help on Density: Density: 3.15 - 3.22, Average = 3.18
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Ellenbergerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2143,KPDmeas= 0.2086,KC= 0.2284
Ncalc = 1.71 - 1.74
Help on Optical Data: Optical Data: Uniaxial (-), e=1.6538-1.6697, w=1.6553-1.6789, bire=0.0015-0.0092.

Calculated Properties of Ellenbergerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Ellenbergerite =3.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEEllenbergerite = 2.04 barns/electron
U=PEEllenbergerite x rElectron Density= 6.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ellenbergerite is Not Radioactive

Ellenbergerite Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.10)Dana Group Ellenbergerite Mg6TiAl6Si8O28(OH)10 P 63 6
Help on  Strunz Class: Strunz Class: 09.AF.80 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AF -Nesosilicates with additional anions;
09.AF.80 Ellenbergerite Mg6TiAl6Si8O28(OH)10 P 63 6

Other Ellenbergerite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Bull.Miner.,Vol.107-111,1984-1988)
Help on See Also: See Also: Links to other databases for Ellenbergerite :
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 - Minerals in Thin Section-University of North Carolina
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 09.AF.80





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