Horvathite-(Y) Mineral Data

Horvathite-(Y) Mineral Data +

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General Horvathite-(Y) Information

Chemical Formula:

NaY(CO3)F2

Composition:

Molecular Weight = 209.90 gm

Sodium 10.95 % Na 14.76 % Na₂O

Yttrium 42.36 % Y 53.79 % Y₂O₃

Carbon 5.72 % C 20.97 % CO₂

Oxygen 22.87 % O

Fluorine 18.10 % F 18.10 % F

- % F -7.62 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaY(CO₃)F₂

Environment:

In a large pegmatite dike.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Poudrette Quarry, Mont Saint-Hillaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

For Elsa (1947-) and Laszlo (1937-) Horvath, husband-and-wife team dedicated to the collection, study, and documentation of the minerals from Mont Saint-Hilaire.

Synonym:

ICSD 76857

IMA1996-032

Horvathite-(Y) Image

Images:

Horvathite-(Y)

Comments: Blocky crystals of horvathite-(Y) in matrix.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Qu?bec, Canada. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Horvathite-(Y) Crystallography

Axial Ratios:

a:b:c =0.7591:1:0.687

Cell Dimensions:

a = 6.964, b = 9.173, c = 6.302, Z = 4; V = 402.58 Den(Calc)= 3.46

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmcn

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.477(1), 5.19(0.9), 2.8(0.5),

Crystal Structure:

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Grice J D , Chao G Y , The Canadian Mineralogist , 35 (1997) p.743-749, Horvathite-(Y), rare-earth fluorocarbonate, a new mineral, species from Mont Saint-Hilaire, Quebec, Locality: Mont Saint-Hilaire, Quebec, Canada

Physical Properties of Horvathite-(Y)

Cleavage:

[100] Very Good, [010] Good

Color:

Colorless, Pale yellow, Pale beige.

Density:

3.58

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Horvathite-(Y)

Gladstone-Dale:

CI meas= 0.123 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.093 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1563,KPDmeas= 0.151,KC= 0.1722

Optical Data:

Biaxial (-), a=1.457, b=1.543, g=1.622, bire=0.1650, 2V(Calc)=82, 2V(Meas)=82. Dispersion none.

Calculated Properties of Horvathite-(Y)

Electron Density:

r_electron=3.23 gm/cc
note: r_{Horvathite-(Y)}=3.46 gm/cc.

Fermion Index

Fermion Index = 0.00073
Boson Index = 0.99927

Photoelectric:

PE_{Horvathite-(Y)}= 53.56 barns/electron
U=PE_{Horvathite-(Y)} x r_electron= 173.06 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Horvathite-(Y) is Not Radioactive

Horvathite-(Y) Classification

Dana Class:

16a.1.10.1 (16a)Carbonates - Hydroxyl or Halogen

(16a.1)in the Bastnasite/Shynchysite/Parasite Groups

(16a.1.10)Dana Group

16a.1.10.1 Horvathite-(Y) ! NaY(CO3)F2 Pmcn 2/m 2/m 2/m

Strunz Class:

V/C.07-64 V - Nitrates, Carbonates and Borates

V/C - Waterfree carbonates with unfamiliar anions

V/C.07 - Bastnäsite-(Y) - Mineevite-(Y) series

V/C.07-10 Bastnasite-(Y) Y(CO3)F P 62c 6 m2

V/C.07-20 Bastnasite-(La) La(CO3)F P 62c 6 m2

V/C.07-30 Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2

V/C.07-40 Hydroxylbastnasite-(La) La(CO3)(OH) C 222₁ 2 2 2

V/C.07-50 Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2

V/C.07-60 Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2

V/C.07-61 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m

V/C.07-62 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m

V/C.07-64 Horvathite-(Y) NaY(CO3)F2 Pmcn 2/m 2/m 2/m

V/C.07-70 Parisite-(Ce) Ca(Ce,La)2(CO3)3F2 R 3 3

V/C.07-80 Parisite-(Nd) Ca(Nd,Ce,La)2(CO3)3F2 R 3 3

V/C.07-90 Rontgenite-(Ce) Ca2(Ce,La)3(CO3)5F3 R 3 3

V/C.07-100 Synchysite-(Y) CaY(CO3)2F C 2/c 2/m

V/C.07-110 Synchysite-(Ce) CaCe(CO3)2F C 2/c 2/m

V/C.07-120 Synchysite-(Nd) CaNd(CO3)2F Unk Ortho

V/C.07-130 Huanghoite-(Ce) BaCe(CO3)2F R 3m 3 2/m

V/C.07-140 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono

V/C.07-150 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono

V/C.07-154 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 2₁/m 2/m

V/C.07-155 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 2₁/m 2/m

V/C.07-160 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 2₁/m 2/m

V/C.07-170 Cordylite-(Ce) Ba(Ce,La)2(CO3)3F2 P 6₃/mmc 6/m 2/m 2/m

V/C.07-175 Lukechangite-(Ce)! Na3Ce2(CO3)4F P 6₃/mmc 6/m 2/m 2/m

V/C.07-190 Mineevite-(Y) Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2 P 6₃/m 6/m

V/C.07-200 Reederite-(Y)! Na15Y2(CO3)9(SO3F)Cl P 6 6

V/C.07-210 Micheelsenite! (Ca,Y)3Al[PO3OH,CO3](CO3)(OH)6·12(H2O) P 6₃ 6

Other Horvathite-(Y) Information

References:

NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.61,p733,1997) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Horvathite-(Y) :
1 - Alkali-Nuts(Francais) 2 -Am. Min. Crystal Structure Database 3 -Athena 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST

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Print or Cut-and-Paste your Horvathite-(Y) Specimen Label here :

Horvathite-(Y)

NaY(CO3)F2
Dana No: 16a.1.10.1 Strunz No: V/C.07-64
Locality:

Notes: