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Nioboaeschynite-(Y)

Formula:
(Y,Ca,Ce,Nd,Th)(Nb,Ti,Ta)
 
2
(O,OH)
 
6
System:OrthorhombicColour:deep brownish red
Hardness:5 - 6


Aeschynite Group

Classification of Nioboaeschynite-(Y)

IMA status:Approved 2006
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:8.3.6.7

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
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Type Occurrence of Nioboaeschynite-(Y)

Type Locality:Bear Lake diggings (Gibson Road Western occurrence), Tory Hill, Monmouth Township, Haliburton Co., Ontario, Canada
Associated Minerals at type locality:
ThoriteQuartzPyriteMonaziteFeldspar Group
CalciteBiotiteApatiteAmphibole Group

Physical Properties of Nioboaeschynite-(Y)

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:deep brownish red
Streak:grayish brown
Hardness (Mohs):5 - 6
Hardness (Vickers):VHN100=922 kg/mm2
Hardness Data:Measured
Cleavage:None Observed
Fracture:Conchoidal

Crystallography of Nioboaeschynite-(Y)

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pban (P2/b 2/a 2/n)
Cell Parameters:a = 5.279Å, b = 10.966Å, c = 7.443Å
Ratio:a:b:c = 0.481 : 1 : 0.679
Unit Cell Volume:V 430.87 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
3.009 (100)
2.931 (69)
3.079 (20)
1.580 (16)
1.863 (14)
2.783 (12)
2.636 (12)

Chemical Properties of Nioboaeschynite-(Y)

Formula:
(Y,Ca,Ce,Nd,Th)(Nb,Ti,Ta)
 
2
(O,OH)
 
6
Essential elements:
All elements listed in formula:Ca, Ce, H, Nb, Nd, O, Ta, Th, Ti, Y
Common Impurities:Fe,Ta

Relationship of Nioboaeschynite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):
4.DF.05Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
4.DF.05Aeschynite-(Nd)
(Nd,Ce,Ca)(Ti,Nb)
 
2
(O,OH)
 
6
4.DF.05Aeschynite-(Y)
(Y,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
4.DF.05Nioboaeschynite-(Ce)
(Ce,Ca,Th)(Nb,Ti)
 
2
(O,OH)
 
6
4.DF.05Nioboaeschynite-(Nd)
(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)
 
2
(O,OH)
 
6
4.DF.05Rynersonite
Ca(Ta,Nb)
 
2
O
 
6
4.DF.05Tantalaeschynite-(Y)
(Y,Ce,Ca)(Ta,Ti,Nb)
 
2
O
 
6
4.DF.05Vigezzite
(Ca,Ce)(Nb,Ti)
 
2
O
 
6
4.DF.10Changbaiite
PbNb
 
2
O
 
6
4.DF.15Murataite-(Y)
(Na,Y)
 
4
(Zn,Fe)
 
3
(Ti,Nb)
 
6
O
 
18
(F,OH)
 
4

Other Names for Nioboaeschynite-(Y)

Synonyms:
IMA2003-038a

Other Information

Health Warning:Radioactive

References for Nioboaeschynite-(Y)

Reference List:Bermanec, V., N. Tomasic, G. Kniewald, M.E. Back, and G. Zagler (2008): Niobioaeschynite-(Y), a new member of the aeschynite group from the Bear Lake Diggings, Haliburton County, Ontario, Canada: Canadian Mineralogist 46, 395 (2008)

Internet Links for Nioboaeschynite-(Y)

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    Localities for Nioboaeschynite-(Y)

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Ontario
      • Haliburton Co.
        • Monmouth Township
          • Tory Hill
    		Can.Min. 46,395(2008)
    South Korea
     
    • Chungcheongbukdo (Chungchong-pukto)
      • Chungju (Chung Won Kum; Chung-ju)
        • Joongwon-gun
          • Mt. Eorae
    		Pavel M. Kartashov analytical data
    Mineral and/or Locality
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