Aeschynite-(Y) Mineral Data (original) (raw)

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

Click Here for Larger Aeschynite-(Y) Image in a New Browser Window Images:

Click Here for Larger Aeschynite-(Y) Image 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 - DipyramidalH-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) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Aeschynite-(Y) Structure Window Crystal Structure:

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| | Bonazzi P , Menchetti S , European Journal of Mineralogy , 11 (1999) p.1043-1049, Crystal chemistry of aeschynite-(Y) from the Western Alps:, residual electron density on difference-Fourier map, Sample: TR1, Locality: western Alps View Additional jPOWD Structure files for Aeschynite-(Y) [1] [2] [3] [4] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

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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Print or Cut-and-Paste your Aeschynite-(Y) Specimen Label here :

Aeschynite-(Y)

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

Notes: