Nioboaeschynite-(Y)
A valid IMA mineral species
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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).
Unique Identifiers
Mindat ID:
29550
Long-form identifier:
mindat:1:1:29550:7
GUID
(UUID V4):
(UUID V4):
4015c3fa-e141-45bd-b932-6acbecfa0ec7
IMA Classification of Nioboaeschynite-(Y)
Approved
Approval year:
2006
Type description reference:
Classification of Nioboaeschynite-(Y)
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Naes-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
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
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.34 g/cm3 (Measured) 5.33 g/cm3 (Calculated)
Optical Data of Nioboaeschynite-(Y)
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 470nm | 3.4% | 14.6% |
| 546nm | 3.3% | 14.1% |
| 589nm | 3.2% | 13.8% |
| 650nm | 3.2% | 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
Chemistry of Nioboaeschynite-(Y)
Mindat 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 Å | (100) |
| 2.931 Å | (69) |
| 3.079 Å | (20) |
| 1.580 Å | (16) |
| 1.863 Å | (14) |
| 2.783 Å | (12) |
| 2.636 Å | (12) |
| 2.006 Å | (11) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Nioboaeschynite-(Y)
General Appearance of Type Material:
Subhedral crystals up to 1 cm in size.
Place of Conservation of Type Material:
Croatian Natural History Museum, Zagreb, Croatia, no. 600:ZAG; 9613MP1.
Geological Setting of Type Material:
Calcite vein-dike.
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. mmm (2/m 2/m 2/m) |
| 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) |
| UM2001-09-O:CaNbREESiTiY | (Ca,Y,REE)(Ti,Nb,Si)2(O,OH)6 | |
| Vigezzite | (Ca,Ce)(Nb,Ta,Ti)2O6 | Orth. mmm (2/m 2/m 2/m) : Pnma |
Related Minerals - Strunz-mindat Grouping
| 4.DF.05 | Aeschynite-(Ce) | (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 |
| 4.DF.05 | Aeschynite-(Nd) | (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6 |
| 4.DF.05 | Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
| 4.DF.05 | Nioboaeschynite-(Ce) | (Ce,Ca)(Nb,Ti)2(O,OH)6 |
| 4.DF.05 | Nioboaeschynite-(Nd) | (Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6 |
| 4.DF.05 | Rynersonite | CaTa2O6 |
| 4.DF.05 | Tantalaeschynite-(Y) | Y(Ta,Ti,Nb)2O6 |
| 4.DF.05 | Vigezzite | (Ca,Ce)(Nb,Ta,Ti)2O6 |
| 4.DF.10 | Changbaiite | PbNb2O6 |
| 4.DF.15 | Murataite-(Y) | (Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 |
Other Information
Health Risks:
Radioactive
Internet Links for Nioboaeschynite-(Y)
mindat.org URL:
https://www.mindat.org/min-29550.html
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References for Nioboaeschynite-(Y)
Reference List:
Localities for Nioboaeschynite-(Y)
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Pe-Piper +1 other reference |
| Bermanec et al. (2008) |
| Färber (n.d.) |
| Mitchell et al. (2017) |
Finland | |
| Al Ani Thair and Torppa Akseli 2011. ... |
Russia | |
| Kovalev et al. (2023) |
South Korea | |
| Pavel.M. Kartashov (n.d.) |
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Quadeville area, Lyndoch Township, Brudenell-Lyndoch-and-Raglan, Renfrew County, Ontario, Canada