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Horváthite-(Y)

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Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
© 2005 DM

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Formula:
NaY[F
 
2
|CO
 
3
]
System:OrthorhombicLustre:Vitreous
Hardness:4
Name:For Elsa (1947-) and László (1937-) Horváth, husband-and-wife team dedicated to the collection, study, and documantation of the minerals from Mont Saint-Hilaire.
This page provides mineralogical data about Horváthite-(Y).

Classification of Horváthite-(Y)

IMA status:Approved 1996
Strunz 8th edition ID:5/C.07-62
Nickel-Strunz 10th (pending) edition ID:5.BD.40

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
Dana 7th edition ID:16.1.11.1
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Type Occurrence of Horváthite-(Y)

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
Geological Setting of type material:From a pegmatite dike

Physical Properties of Horváthite-(Y)

Lustre:Vitreous
Hardness (Mohs):4
Cleavage:Very Good
[100] Very Good, [010] Good
Fracture:Irregular/Uneven
Density (measured):3.58 g/cm3
Density (calculated):3.46 g/cm3

Crystallography of Horváthite-(Y)

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pmmn (P21/m 21/m 2/n)
Cell Parameters:a = 6.964Å, b = 9.173Å, c = 6.302Å
Ratio:a:b:c = 0.759 : 1 : 0.687
Unit Cell Volume:V 402.58 ų
Z:4

Optical Data of Horváthite-(Y)

Type:Biaxial (-)
RI values: nα = 1.457 nβ = 1.543 nγ = 1.622
2V:Measured: 82° , Calculated: 82°
Maximum Birefringence:δ = 0.165

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Horváthite-(Y)

Formula:
NaY[F
 
2
|CO
 
3
]
Essential elements:C, F, Na, O, Y
All elements listed in formula:C, F, Na, O, Y

Relationship of Horváthite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):
5.BD.05Cordylite-(Ce)
(Na,Ca)BaCe
 
2
(CO
 
3
)
 
4
F
5.BD.05Lukechangite-(Ce)
Na
 
3
Ce
 
2
[F|(CO
 
3
)
 
4
]
5.BD.10Zhonghuacerite-(Ce)
Ba
 
2
Ce[F|(CO
 
3
)
 
3
]
5.BD.10Kukharenkoite-(Ce)
Ba
 
2
Ce[F|(CO
 
3
)
 
3
]
5.BD.10Kukharenkoite-(La)
Ba
 
2
(La,Ce,Th)[F|(CO
 
3
)
 
3
]
5.BD.15Cebaite-(Ce)
Ba
 
3
Ce
 
2
[F
 
2
|(CO
 
3
)
 
5
]
5.BD.15Cebaite-(Nd)
Ba
 
3
(Nd,Ce)
 
2
[F
 
2
|(CO
 
3
)
 
5
]
5.BD.20Synchysite-(Ce)
Ca(Ce,La)[F|(CO
 
3
)
 
2
]
5.BD.20Synchysite-(Nd)
Ca(Nd,Y,Gd)[F|(CO
 
3
)
 
2
]
5.BD.20Synchysite-(Y)
Ca(Y,Ce)[F|(CO
 
3
)
 
2
]
5.BD.25Huanghoite-(Ce)
BaCe[F|(CO
 
3
)
 
2
]
5.BD.25Qaqarssukite-(Ce)
Ba(Ce,REE) (CO
 
3
)
 
2
F
5.BD.30Parisite-(Ce)
Ca(Ce,La)
 
2
[F
 
2
|(CO
 
3
)
 
3
]
5.BD.30Parisite-(Nd)
Ca(Nd,Ce,La)
 
2
[F
 
2
|(CO
 
3
)
 
3
]
5.BD.30Röntgenite-(Ce)
Ca
 
2
(Ce,La)
 
3
[F
 
3
|(CO
 
3
)
 
5
]
5.BD.35Bastnäsite-(Ce)
(Ce,La)[F|CO
 
3
]
5.BD.35Bastnäsite-(La)
(La,Ce)[F|CO
 
3
]
5.BD.35Bastnäsite-(Y)
(Y,Ce)[F|CO
 
3
]
5.BD.35Hydroxylbastnäsite-(Ce)
(Ce,La)[(OH,F)|CO
 
3
]
5.BD.35Hydroxylbastnäsite-(Nd)
(Nd,Ce,La)[(OH,F)|CO
 
3
]
5.BD.35Hydroxylbastnäsite-(La)
(La,Ce)[(OH,F)|CO
 
3
]
5.BD.35Thorbastnäsite
Th(Ca,Ce)(CO
 
3
)
 
2
F
 
2
·3H
 
2
O

Other Names for Horváthite-(Y)

Synonyms:
IMA1996-032
Russian names:
Хорватит-(Y)

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Horváthite-(Y)

Reference List:Mineralogical Magazine (1997): 61: 733.

Mineralogical Record: 29: 236.

Canadian Mineralogist: 35: 743-749.

Internet Links for Horváthite-(Y)

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  • Raman and XRD data at RRUFF project
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  • Horváthite-(Y) details from Handbook of Mineralogy (PDF)
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    Localities for Horváthite-(Y)

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    Canada
     
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		Grice, J.D. and Chao, G.Y. (1997), Horvathite-(Y), rare earth fluorocarbonate, a new mineral species from Mont Saint-Hilaire, Quebec. Canadian Mineralogist: 35:743-750.
    Mineral and/or Locality
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