Mineralogy Database

Bastnasite-(Y) Mineral Data

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General Bastnasite-(Y) Information

Help on Chemical  Formula: Chemical Formula: Y(CO3)F
Help on Composition: Composition: Molecular Weight = 167.91 gm
   Yttrium   52.95 %  Y    67.24 % Y2O3
   Carbon     7.15 %  C    26.21 % CO2
   Oxygen    28.59 %  O
   Fluorine  11.31 %  F    11.31 % F
               -   %   F    -4.76 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y(CO3)F
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Y end member and after the Bastnas Mine, Riddarhyttan, Vastmanland, Sweden.
Help on Name Pronunciation: Name Pronunciation: Bastnasite-(Y) + Pronunciation Say BASTNASITE-(Y)
Help on Synonym: Synonym: Hamartite

Bastnasite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.44292
Help on Cell Dimensions: Cell Dimensions: a = 6.57, c = 9.48, Z = 6; V = 354.38 Den(Calc)= 4.72
Help on Crystal System: Crystal System: Hexagonal - Ditrigonal Dipyramidal H-M Symbol (6 m2) Space Group: P 62c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.948(1), 2.78(1), 3.43(0.75),

Physical Properties of Bastnasite-(Y)

Help on Cleavage: Cleavage: {1011} Imperfect, {0001} Indistinct
Help on Color: Color: Yellow, Reddish brown.
Help on Density: Density: 4.9 - 5, Average = 4.95
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Bastnasite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.07 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1626,KPDmeas= 0.1551,KC= 0.1749
Ncalc = 1.83 - 1.87
Help on Optical Data: Optical Data: Uniaxial (+), w=1.717, e=1.818, bire=0.1010.

Calculated Properties of Bastnasite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.39 gm/cc
note: Specific Gravity of Bastnasite-(Y) =4.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0009240483
Boson Index = 0.9990759517
Help on Photoelectric: Photoelectric: PEBastnasite-(Y) = 67.02 barns/electron
U=PEBastnasite-(Y) x rElectron Density= 293.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bastnasite-(Y) is Not Radioactive

Bastnasite-(Y) Classification

Help on  Dana Class: Dana Class: 16a.01.01.03 (16a)Carbonates - Hydroxyl or Halogen
  (16a.01)in the Bastnasite/Shynchysite/Parasite Groups
  (16a.01.01)Bastnasite Subgroup
16a.01.01.01 Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2
16a.01.01.02 Bastnasite-(La) La(CO3)F P 62c 6 m2
16a.01.01.03 Bastnasite-(Y) Y(CO3)F P 62c 6 m2
Help on  Strunz Class: Strunz Class: 05.BD.20a 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BD -With rare-earth elements (REE)
05.BD.20a Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2
05.BD.20a Bastnasite-(La) La(CO3)F P 62c 6 m2
05.BD.20a Bastnasite-(Y) Y(CO3)F P 62c 6 m2
05.BD.20a Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2
05.BD.20a Hydroxylbastnasite-(La) La(CO3)(OH) C 2221 2 2 2
05.BD.20a Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2
05.BD.20a Thorbastnasite Th(Ca,Ce)(CO3)2F2•3(H2O) P 62c 6 m2

Other Bastnasite-(Y) Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Bastnasite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: 16a.01.01.03 Strunz No: 05.BD.20a





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