Mineralogy Database

Horvathite-(Y) Mineral Data

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General Horvathite-(Y) Information

Help on Chemical  Formula: Chemical Formula: NaY(CO3)F2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: NaY(CO3)F2
Help on Environment: Environment: In a large pegmatite dike.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Poudrette Quarry, Mont Saint-Hillaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: 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.
Help on Name Pronunciation: Name Pronunciation: Horvathite-(Y) + Pronunciation Say HORVATHITE-(Y)
Help on Synonym: Synonym: ICSD 76857

Horvathite-(Y) Image

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

Horvathite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7591:1:0.687
Help on Cell Dimensions: Cell Dimensions: a = 6.964, b = 9.173, c = 6.302, Z = 4; V = 402.58 Den(Calc)= 3.46
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmcn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.477(1), 5.19(0.9), 2.8(0.5),

Physical Properties of Horvathite-(Y)

Help on Cleavage: Cleavage: {100} Very Good, {010} Good
Help on Color: Color: Colorless, Pale yellow, Pale beige.
Help on Density: Density: 3.58
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Horvathite-(Y)

Help on Optical Data: 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)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.23 gm/cc
note: Specific Gravity of Horvathite-(Y) =3.46 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007392041
Boson Index = 0.9992607959
Help on Photoelectric: Photoelectric: PEHorvathite-(Y) = 53.56 barns/electron
U=PEHorvathite-(Y) x rElectron Density= 173.06 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Horvathite-(Y) is Not Radioactive

Horvathite-(Y) Classification

Help on  Dana Class: Dana Class: 16a.01.10.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.01)in the Bastnasite/Shynchysite/Parasite Groups
  (16a.01.10)Dana Group
16a.01.10.01 Horvathite-(Y)! NaY(CO3)F2 Pmcn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.BD.25 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BD -With rare-earth elements (REE)
05.BD.25 Horvathite-(Y)! NaY(CO3)F2 Pmcn 2/m 2/m 2/m

Other Horvathite-(Y) Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.61,p733,1997) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Horvathite-(Y) :
1 - Alkali-Nuts(Francais)
2 - Am. Min. Crystal Structure Database
3 - Athena
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: 16a.01.10.01 Strunz No: 05.BD.25





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