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Aeschynite-(Y) Mineral Data

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General Aeschynite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ca,Fe)(Ti,Nb)2(O,OH)6
Help on Composition: Composition: Molecular Weight = 274.97 gm
   Calcium    4.37 %  Ca    6.12 % CaO
   Yttrium   19.40 %  Y    24.64 % Y2O3
   Titanium  30.47 %  Ti   50.84 % TiO2
   Niobium    8.45 %  Nb   12.08 % Nb2O5
   Iron       2.03 %  Fe    2.61 % FeO
   Hydrogen   0.37 %  H     3.28 % H2O
   Oxygen    34.91 %  O
            ______        ______ 
            100.00 %       99.56 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.6Ca0.3Fe2+0.1Ti1.75Nb0.25O5(OH)
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Norway, Urstad, Hittero Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition and from the Greek for "shame," in allusion to the inability of chemists, at the time of its discovery, to separate some of its constituents.
Help on Name Pronunciation: Name Pronunciation: Aeschynite-(Y) + Pronunciation Say AESCHYNITE-(Y)
Help on Synonym: Synonym: Eschynite
 

Aeschynite-(Y) Image

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  Aeschynite-(Y)

Comments: Square crystal of aeschynite-(Y) on a matrix of albite, quartz and muscovite.
Location: Val. Pellice, Piedmont, Italy. Scale: Crystal Size 1 mm.
© John Veevaert

Aeschynite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4717:1:0.6748
Help on Cell Dimensions: Cell Dimensions: a = 5.18, b = 10.98, c = 7.41, Z = 4; V = 421.45 Den(Calc)= 4.33
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.91(1), 2.99(0.8), 3.07(0.3),
Help on Forms: Forms:

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Forms: ( 0 2 1) ( 0 1 0) ( 1 2 0) ( 1 1 0) ( 1 1 1)

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Physical Properties of Aeschynite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Brownish black, Brown, Brownish yellow, Yellowish.
Help on Density: Density: 4.85 - 5.13, Average = 4.99
Help on Diaphaneity: Diaphaneity: Transparent to subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: reddish yellow
 

Optical Properties of Aeschynite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.245 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.129 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2637,KPDmeas= 0.2289,KC= 0.303
Ncalc = 2.31 - 2.55
Help on Optical Data: Optical Data: Isotropic, n=2.142.
 

Calculated Properties of Aeschynite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.09 gm/cc
note: Specific Gravity of Aeschynite-(Y) =4.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEAeschynite-(Y) = 43.12 barns/electron
U=PEAeschynite-(Y) x rElectron Density= 176.20 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aeschynite-(Y) is Not Radioactive
 

Aeschynite-(Y) Classification

Help on  Dana Class: Dana Class: 08.03.06.03 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.06)Aeschynite group
 
08.03.06.01 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m
 
08.03.06.02 Nioboaeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
08.03.06.03 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
08.03.06.04 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m
 
08.03.06.05 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m
 
08.03.06.06 Nioboaeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
08.03.06.07 Nioboaeschynite-(Y)! [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6 Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DF.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DF -With large (� medium-sized) cations; dimers and trimers of edge-sharing octahedra
 
04.DF.05 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m
 
04.DF.05 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m
 
04.DF.05 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Nioboaeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Nioboaeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Rynersonite Ca(Ta,Nb)2O6 Pmnb 2/m 2/m 2/m
 
04.DF.05 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Vigezzite (Ca,Ce)(Nb,Ta,Ti)2O6 Pmnb 2/m 2/m 2/m
 
04.DF.05 Nioboaeschynite-(Y)! [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6 Pbnm 2/m 2/m 2/m
 

Other Aeschynite-(Y) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Aeschynite-(Y) :
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 (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Aeschynite-(Y)

(Y,Ca,Fe)(Ti,Nb)2(O,OH)6
Dana No: 08.03.06.03 Strunz No: 04.DF.05
Locality:

 

Notes:

 

 
   
 


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