Mineralogy Database

Hafnon Mineral Data

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General Hafnon Information

Help on Chemical  Formula: Chemical Formula: HfSiO4
Help on Composition: Composition: Molecular Weight = 244.28 gm
   Hafnium    58.45 %  Hf   68.93 % HfO2
   Zirconium   2.24 %  Zr    3.03 % ZrO2
   Silicon    13.11 %  Si   28.04 % SiO2
   Oxygen     26.20 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Hf0.8Zr0.06Si1.14O4
Help on Environment: Environment: Found in tantalum-bearing granite pegmatites and in a weathered pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: (Zambezia district, Mozambique and Mt. Holland, Western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition containing hafnium.
Help on Name Pronunciation: Name Pronunciation: Hafnon Say HAFNON
Help on Synonym: Synonym: ICSD 59111
  PDF 20-467

Hafnon Image

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Comments: Colorless unconsolidated hafnon grains, sample is from Speer and Cooper (1982).
Location: Synthetic from Alex Speer. Scale: See Image.
© Rruff Database

Hafnon Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.90729
Help on Cell Dimensions: Cell Dimensions: a = 6.5725, c = 5.9632, Z = 4; V = 257.60 Den(Calc)= 6.30
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.29(1), 2.512(0.7), 4.43(0.6),

Physical Properties of Hafnon

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Colorless, Brownish, Yellow.
Help on Density: Density: 6.97
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: gray white

Optical Properties of Hafnon

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1552,KPDmeas= 0.1402,KC= 0.144
Ncalc = 1.91 - 2
Help on Optical Data: Optical Data: Uniaxial (+), w=1.93-1.97, e=1.98-2.03, bire=0.0500-0.0600.

Calculated Properties of Hafnon

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.16 gm/cc
note: Specific Gravity of Hafnon =6.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.19
Boson Index = 0.81
Help on Photoelectric: Photoelectric: PEHafnon = 651.76 barns/electron
U=PEHafnon x rElectron Density=4,015.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hafnon is Not Radioactive

Hafnon Classification

Help on  Dana Class: Dana Class: (51)Nesosilicate Insular SiO4 Groups Only
  (51.05)with cations in >[6] coordination
  (51.05.02)Zircon group Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m Thorite ThSiO4 I 41/amd 4/m 2/m 2/m Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m IMA2008-035! CeSiO4 I 41/amd 4mm
Help on  Strunz Class: Strunz Class: 09.AD.30 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AD -Nesosilicates without additional anions;
09.AD.30 Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
09.AD.30 Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m
09.AD.30 Thorite ThSiO4 I 41/amd 4/m 2/m 2/m
09.AD.30 Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
09.AD.30 Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m
09.AD.30 IMA2008-035! CeSiO4 I 41/amd 4mm

Other Hafnon Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Hafnon :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineral and Gemstone Kingdom
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - University of Colorado - Mineral Structure Data

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Dana No: Strunz No: 09.AD.30





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