Nioboaeschynite-(Y)
This page is currently not sponsored. Click here to sponsor this page.
About Nioboaeschynite-(Y)
Formula:
(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6
Colour:
Deep brownish red
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
5.34
Crystal System:
Orthorhombic
Member of:
Name:
Named as the niobium analogue of Aeschynite-(Y).
The Nb analogue of Aeschynite-(Y).
Compare the chemically very similar Euxenite-(Y) which has different space-group symmetry. Compare also Fergusonite-(Y).
Compare the chemically very similar Euxenite-(Y) which has different space-group symmetry. Compare also Fergusonite-(Y).
Classification of Nioboaeschynite-(Y)
Approved
Approval Year:
2006
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
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
8.3.6.7
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
Physical Properties of Nioboaeschynite-(Y)
Vitreous
Transparency:
Translucent
Colour:
Deep brownish red
Comment:
Otherwise it is dark, almost black
Streak:
Grayish brown
Hardness:
5 - 6 on Mohs scale
Hardness:
VHN100=922 kg/mm2 - Vickers
Hardness Data:
Measured
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.34 g/cm3 (Measured) 5.33 g/cm3 (Calculated)
Optical Data of Nioboaeschynite-(Y)
Type:
Isotropic
Reflectivity:
| 470 nm | R1=3.4% | R2=14.6% |
| 546nm | R1=3.3% | R2= 14.1% |
| 589nm | R1=3.2% | R2= 13.8% |
| 650nm | R1=3.2% | R2=13.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 14.6%.
R1 shown in black, R2 shown in red
Chemical Properties of Nioboaeschynite-(Y)
Formula:
(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6
Common Impurities:
Fe,Ta
Crystallography of Nioboaeschynite-(Y)
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pban
Cell Parameters:
a = 5.279 Å, b = 10.966 Å, c = 7.443 Å
Ratio:
a:b:c = 0.481 : 1 : 0.679
Unit Cell V:
430.87 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.009 | (100) |
| 2.931 | (69) |
| 3.079 | (20) |
| 1.580 | (16) |
| 1.863 | (14) |
| 2.783 | (12) |
| 2.636 | (12) |
| 2.006 | (11) |
Type Occurrence of Nioboaeschynite-(Y)
Associated Minerals at Type Locality:
Reference:
Bermanec, V., Tomašić, N., Kniewald, G., Back, M.E., Zagler, G. (2008): Nioboaeschynite-(Y), a new member of the aeschynite group from the Bear Lake diggings, Haliburton County, Ontario, Canada. Canadian Mineralogist: 46: 395-402.
Synonyms of Nioboaeschynite-(Y)
Other Language Names for Nioboaeschynite-(Y)
Simplified Chinese:铌钇易解石
Relationship of Nioboaeschynite-(Y) to other Species
Member of:
Other Members of this group:
| Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmna |
| Aeschynite-(Nd) | (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) |
| Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmna |
| Nioboaeschynite-(Ce) | (Ce,Ca)(Nb,Ti)2(O,OH)6 | Orth. |
| Nioboaeschynite-(Nd) | (Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6 | Orth. |
| Rynersonite | CaTa2O6 | Orth. mmm (2/m 2/m 2/m) |
| Tantalaeschynite-(Y) | Y(Ta,Ti,Nb)2O6 | Orth. mmm (2/m 2/m 2/m) |
| Vigezzite | (Ca,Ce)(Nb,Ta,Ti)2O6 | Orth. |
Related Minerals - Nickel-Strunz Grouping
| 4.DF.05 | Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmna |
| 4.DF.05 | Aeschynite-(Nd) | (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) |
| 4.DF.05 | Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmna |
| 4.DF.05 | Nioboaeschynite-(Ce) | (Ce,Ca)(Nb,Ti)2(O,OH)6 | Orth. |
| 4.DF.05 | Nioboaeschynite-(Nd) | (Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6 | Orth. |
| 4.DF.05 | Rynersonite | CaTa2O6 | Orth. mmm (2/m 2/m 2/m) |
| 4.DF.05 | Tantalaeschynite-(Y) | Y(Ta,Ti,Nb)2O6 | Orth. mmm (2/m 2/m 2/m) |
| 4.DF.05 | Vigezzite | (Ca,Ce)(Nb,Ta,Ti)2O6 | Orth. |
| 4.DF.10 | Changbaiite | PbNb2O6 | Trig. |
| 4.DF.15 | Murataite-(Y) | (Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 | Iso. m3m (4/m 3 2/m) : Fm3m |
Related Minerals - Dana Grouping (8th Ed.)
| 8.3.6.1 | Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmna |
| 8.3.6.2 | Nioboaeschynite-(Ce) | (Ce,Ca)(Nb,Ti)2(O,OH)6 | Orth. |
| 8.3.6.3 | Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmna |
| 8.3.6.4 | Tantalaeschynite-(Y) | Y(Ta,Ti,Nb)2O6 | Orth. mmm (2/m 2/m 2/m) |
| 8.3.6.5 | Aeschynite-(Nd) | (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 | Orth. mmm (2/m 2/m 2/m) |
Other Information
Health Risks:
Radioactive
References for Nioboaeschynite-(Y)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bermanec, V., Tomašić, N., Kniewald, G., Back, M.E., Zagler, G. (2008): Nioboaeschynite-(Y), a new member of the aeschynite group from the Bear Lake diggings, Haliburton County, Ontario, Canada. Canadian Mineralogist: 46: 395-402.
Internet Links for Nioboaeschynite-(Y)
mindat.org URL:
https://www.mindat.org/min-29550.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
Localities for Nioboaeschynite-(Y)
ⓘ - Click for 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 (eg from pseudomorphs.)
All localities listed without proper references should be considered as questionable.
- 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).
All localities listed without proper references should be considered as questionable.
Canada (TL) | |
| Bermanec V, Tomašić N, Kniewald G, Back M E, Zagler G (2008) Nioboaeschynite-(Y), a new member of the aeschynite group from the Bear Lake diggings, Haliburton County, Ontario, Canada, The Canadian Mineralogist 46, 395-402 |
| Specimen obtained from and analyzed by Gunnar Färber. |
| Mitchell, R.H. & Smith, D.L. (2017) Geology and mineralogy of the Ashram zone carbonatite, Eldor complex, Quebec. Ore Geology Reviews 86, 784-806. |
Finland | |
| Al Ani Thair and Torppa Akseli 2011. REE-Nb mineralogy in Katajakangas and Lamujärvi alkaline rocks, Central Finland |
South Korea | |
| Pavel M. Kartashov analytical data |
Quadeville area, Renfrew Co., Ontario, Canada