Aeschynite-(Nd) (original) (raw)
A valid IMA mineral species
About Aeschynite-(Nd)Hide
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Formula:
(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6
Colour:
Dark to pale brown, brownish black
Specific Gravity:
4.6 - 5.04
Crystal System:
Orthorhombic
Name:
For its relationship to Aeschynite-(Ce), with Neodymium as the dominant rare-earth element.
Forms as tabular and prismatic crystals, up to several mm, and as equigranular and radiating crystal clusters, or massive.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:38:9
fc9e0e49-3e25-4412-acbe-6aebfeebf8ee
IMA Classification of Aeschynite-(Nd)Hide
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Type description reference:
Classification of Aeschynite-(Nd)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
8.3.6.5
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.2.14
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-Nd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Aes | 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-(Nd)Hide
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Transparency:
Transparent, Translucent
Colour:
Dark to pale brown, brownish black
Comment:
Yellowish orange to reddish orange in thin section; dark grey in reflected light.
Streak:
Light yellowish brown
Density:
4.6 - 5.04 g/cm3 (Measured)
Optical Data of Aeschynite-(Nd)Hide
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Birefringence:
Isotropic minerals have no birefringence
Dispersion:
weak to strong
Colour in reflected light:
dark grey
Chemistry of Aeschynite-(Nd)Hide
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Mindat Formula:
(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6
Crystallography of Aeschynite-(Nd)Hide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Comment:
Metamict, space group nd
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 1.53 Å | (6) |
| 1.575 Å | (7) |
| 1.95 Å | (6) |
| 2.64 Å | (5) |
| 2.93 Å | (10) |
| 3.00 Å | (9) |
| 5.45 Å | (5) |
Comments:
Material from Bayan Obo, China, after heating at 800 °C; before heating, only one line at 2.03 A was observed
Geological EnvironmentHide
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Geological Setting:
In veins in slate and metamorphosed dolostone.
Type Occurrence of Aeschynite-(Nd)Hide
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General Appearance of Type Material:
as tabular and prismatic crystals to several mm, as equigranular and radiating clusters, also massive
Geological Setting of Type Material:
veins in slate and metamorphosed dolostone
Associated Minerals at Type Locality:
Reference:
Zhang, P., Tao, K. (1982) Aeschynite-(Nd). Scientia Geologica Sinica: 1982(4): 424-428. [in Chinese with English abstract]
Synonyms of Aeschynite-(Nd)Hide
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Other Language Names for Aeschynite-(Nd)Hide
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Relationship of Aeschynite-(Nd) 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-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a |
| 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-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a |
| 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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Notes:
Radioactive.
The mineral is readily soluble in warm HCl,
H2SO4, H3PO4 and weakly in HNO3.
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-(Nd)Hide
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References for Aeschynite-(Nd)Hide
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Reference List:
Dunn, Pete J., Chao, George Y., Grice, Joel D., Ferraiolo, James A., Fleischer, Michael, Pabst, Adolf, Zilczer, Janet A. (1984) New mineral names. American Mineralogist, 69 (5-6) 565-569
Localities for Aeschynite-(Nd)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.
| Canada | |
|---|---|
| Ontario Renfrew County Brudenell-Lyndoch-and-Raglan Lyndoch Township Quadeville area ⓘ Beryl Pit ? | ontariominerals.com |
| Québec Nord-du-Québec Nunavik ⓘ Eldor carbonatite | Beland et al. (2021) |
| China | |
| Inner Mongolia Baotou City (Baotou Prefecture) Bayan Obo mining district Bayan Obo ⓘ Bayan Obo deposit | Yi-Li et al. (2023) |
| ⓘ East Mine (TL) | Peishan Zhang and Kejie Tao (1982) +1 other reference |
| Czech Republic | |
| Vysočina Region Třebíč District ⓘ Klučov | Pauliš P. et al. (Kutna Hora, issue 1) |
| ⓘ Kožichovice | Pauliš P. et al. (Kutna Hora, issue 1) |
| Slavičky ⓘ Pozd'átky | Pauliš P. et al. (Kutna Hora, issue 1) |
| Mexico | |
| Yucatán northwest coastline of the Yucatán peninsula Puerto Chicxulub ⓘ Chicxulub impact structure | Wittmann A (2022) |
| Romania | |
| Harghita County Ditrău Complex ⓘ Jolotca (Orotva) | Szakáll et al. (2010) |
| Russia | |
| Chelyabinsk Oblast Kyshtym ⓘ Mochalin Log | webmineral.ru (2020) +1 other reference |
| Krasnoyarsk Krai Enisei Range (Yenisei Ridge; Enisei Ridge) Tatarka Range ⓘ Tatarskii Massif | Pekov (1998) |
| South Korea | |
| North Chungcheong Province Chungju City Joongwon-gun Mt. Eorae ⓘ Chungju deposit |
Pavel.M. Kartashov (n.d.) |