Aeschynite-(Y) (original) (raw)
A valid IMA mineral species - grandfathered
About Aeschynite-(Y)Hide
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Formula:
(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Colour:
Pale yellow, yellow-orange, pale greenish yellow, black, brownish black
Lustre:
Resinous, Waxy, Pearly, Sub-Metallic
Specific Gravity:
4.82 - 4.93
Crystal System:
Orthorhombic
Name:
For its relationship to Aeschynite-(Ce), with yttrium as the dominant rare-earth element. First named in 1906 as blomstrandine by Waldemar Christofer Brøgger, in honor of Christian Wilhelm Blomstrand [October 20, 1826 Växjö, Sweden – November 5, 1897 Lund, Sweden], professor of chemistry at the University of Lund, who did the chemical analysis. Brøgger had earlier published a crystallographic description of this material in 1879 from Urstad Feldspar Mine, Hidra, Vest-Agder, Norway but then without a chemical analysis. He first thought it to be identical with aeschynite (From Miask, which later was named aeschynite-(Ce)). Later, in his description in 1906 he states that the blomstrandine from Hitterö was a "Yttrium-Aeschynit".
The mineral was later renamed Aeschynite-(Y) by the IMA in 1987 following Levinson (1966).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:39:6
1aa8de76-7ac8-43f1-a2bb-e3d015521810
IMA Classification of Aeschynite-(Y)Hide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
Approval history:
Renamed by IMA in 1987 (special procedure) as aeschynite-(Y).
Type description reference:
Classification of Aeschynite-(Y)Hide
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4.DF.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
F : With large (+- medium-sized) cations; dimers and trimers of edgesharing octahedra
8.3.6.3
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.2.15
18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Aes-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Aes-(Y) | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Aeschynite-(Y)Hide
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Resinous, Waxy, Pearly, Sub-Metallic
Transparency:
Transparent, Translucent
Comment:
Submetallic to pearly on crystal faces, resinous to waxy on fracture surfaces.
Colour:
Pale yellow, yellow-orange, pale greenish yellow, black, brownish black
Streak:
White, pale yellow, reddish yellow
Cleavage:
Perfect
on {100}, {010} and {001}
Fracture:
Irregular/Uneven
Density:
4.82 - 4.93 g/cm3 (Measured) 5.5 g/cm3 (Calculated)
Optical Data of Aeschynite-(Y)Hide
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RI values:
_n_α = 2.190 - 2.280 _n_β = 2.210 - 2.300 _n_γ = 2.340 - 2.500
δ = 0.150 - 0.220
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of Aeschynite-(Y)Hide
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Mindat Formula:
(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Chemical AnalysisHide
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Sample references:
| ID | Type | Locality | Reference | Notes |
|---|---|---|---|---|
| 1 | Type Specimen | Urstad Feldspar Mine, Hidra, Flekkefjord, Agder, Norway | Brøgger, W.C. (1879): Untersuchungen norwegischer Mineralien I. Zeitschrift für Krystallographie und Mineralogie 3, 471-487 (+ plates XI-XIII); Brøgger, W.C. (1906): Die Mineralien der Südnorwegischen Granitpegmatitgänge, I. Niobate, tantalate, titanate und titanoniobate. Videnskapsselskapets Skrifter. I.Mat-Naturv. Klasse 1906, 6: 97- 104 | Wet-chemical analysis by Blomstrand (in Brøgger 1879) |
Crystallography of Aeschynite-(Y)Hide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 7.47 Å, b = 10.98 Å, c = 5.18 Å
Ratio:
a:b:c = 0.68 : 1 : 0.472
Unit Cell V:
424.87 ų (Calculated from Unit Cell)
Morphology:
Crystals to 10 cm, commonly tabular, less commonly prismatic, forms {001}, {010}, {021}, {110}, {210} and {111}, also granular and massive
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0006807 | Aeschynite-(Y) | Bonazzi P, Menchetti S (1999) Crystal chemistry of aeschynite-(Y) from the Western Alps: residual electron density on difference-Fourier map European Journal of Mineralogy 11 1043-1049 | 1999 | western Alps | 0 | 293 | |
| 0006808 | Aeschynite-(Y) | Bonazzi P, Menchetti S (1999) Crystal chemistry of aeschynite-(Y) from the Western Alps: residual electron density on difference-Fourier map European Journal of Mineralogy 11 1043-1049 | 1999 | western Alps | 0 | 293 | |
| 0006809 | Aeschynite-(Y) | Bonazzi P, Menchetti S (1999) Crystal chemistry of aeschynite-(Y) from the Western Alps: residual electron density on difference-Fourier map European Journal of Mineralogy 11 1043-1049 | 1999 | western Alps | 0 | 293 | |
| 0006810 | Aeschynite-(Y) | Bonazzi P, Menchetti S (1999) Crystal chemistry of aeschynite-(Y) from the Western Alps: residual electron density on difference-Fourier map - note: O1 z coordinate altered to match reported bond lengths European Journal of Mineralogy 11 1043-1049 | 1999 | western Alps | 0 | 293 | |
| 0006811 | Aeschynite-(Y) | Bonazzi P, Menchetti S (1999) Crystal chemistry of aeschynite-(Y) from the Western Alps: residual electron density on difference-Fourier map European Journal of Mineralogy 11 1043-1049 | 1999 | western Alps | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.27 Å | (4) |
| 4.34 Å | (5) |
| 2.902 Å | (10) |
| 2.715 Å | (5) |
| 2.503 Å | (4) |
| 1.059 Å | (7) |
| 1.051 Å | (7) |
Comments:
Sample from "Southern China"
Geological EnvironmentHide
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Geological Setting:
In granite and granite pegmatites, in ankerite-dolomitic carbonatites, as a detrital mineral in placers.
Type Occurrence of Aeschynite-(Y)Hide
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Geological Setting of Type Material:
Reference:
Brøgger, W.C. (1906) Die Mineralien der Südnorwegischen Granitpegmatitgänge, I. Niobate, tantalate, titanate und titanoniobate. Videnskapsselskapets Skrifter. I.Mat-Naturv. Klasse 1906: 6: 98-104.
Synonyms of Aeschynite-(Y)Hide
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Other Language Names for Aeschynite-(Y)Hide
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Relationship of Aeschynite-(Y) to other SpeciesHide
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Other Members of this group:
| Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a |
|---|---|---|
| Aeschynite-(Nd) | (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| Nioboaeschynite-(Ce) | (Ce,Ca)(Nb,Ti)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| Nioboaeschynite-(Nd) | (Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6 | Orth. |
| Nioboaeschynite-(Y) | (Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b a n |
| Rynersonite | CaTa2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| Tantalaeschynite-(Y) | Y(Ta,Ti,Nb)2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| UM2001-09-O:CaNbREESiTiY | (Ca,Y,REE)(Ti,Nb,Si)2(O,OH)6 | |
| Vigezzite | (Ca,Ce)(Nb,Ta,Ti)2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 4.DF.05 | Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a |
|---|---|---|---|
| 4.DF.05 | Aeschynite-(Nd) | (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 4.DF.05 | Tantalaeschynite-(Y) | Y(Ta,Ti,Nb)2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 4.DF.05 | Vigezzite | (Ca,Ce)(Nb,Ta,Ti)2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 4.DF.05 | Nioboaeschynite-(Ce) | (Ce,Ca)(Nb,Ti)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 4.DF.05 | Nioboaeschynite-(Nd) | (Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6 | Orth. |
| 4.DF.05 | Nioboaeschynite-(Y) | (Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b a n |
| 4.DF.05 | Rynersonite | CaTa2O6 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 4.DF.10 | Changbaiite | PbNb2O6 | Trig. 3_m_ : R_3_m |
| 4.DF.15 | Murataite-(Y) | (Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 | Iso. m_3_m _(_4/_m_32/m ) : F m_3_m |
Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Aeschynite-(Y)Hide
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References for Aeschynite-(Y)Hide
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Reference List:
Localities for Aeschynite-(Y)Hide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.