Hafnon (original) (raw)
Colour:
Red-orange, brown-yellow, colourless (rare)
Specific Gravity:
6.97 (Calculated)
Crystal System:
Tetragonal
Name:
In allusion to its composition, being a silicate of HAFNium, and ending in "ON" in allusion to, and to be consistent with, its relationship to ZircON.
The hafnium analogue of Thorite and Zircon. Its physical properties are similar to those of zircon, so without an analysis it is not possible to positively identify a specimen as hafnon.
An isomorphous series exists between ZrSiO4-HfSiO 4, the Zircon-Hafnon Series.
If a (Hf,Zr)SiO4 sample is Hf-dominant (i.e. Hf>Zr) then it is named hafnon, otherwise it is zircon. For Zr-rich hafnon and Hf-rich zircon the modifiers "Hf/Zr-bearing" or "Hf/Zr-rich" can be used.
Currently the only hafnium-dominant mineral known, although native hafnium (not approved) was announced quite recently.
Type locality: See discussion on messageboard at https://www.mindat.org/mesg-558525.html.
Transparency:
Transparent, Translucent
Colour:
Red-orange, brown-yellow, colourless (rare)
Density:
6.97 g/cm3 (Calculated)
Comment:
data for the synthetic material
RI values:
_n_ω = 1.930 - 1.970 _n_ε = 1.980 - 2.030
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Crystal System:
Tetragonal
Class (H-M):
4/m m m _(_4/_m_2/_m_2/m ) - Ditetragonal Dipyramidal
Cell Parameters:
a = 6.5725(7) Å, c = 5.9632(4) Å
Unit Cell V:
257.60 ų (Calculated from Unit Cell)
Morphology:
Crystals euhedral to irregular. Often zoned with zircon.
Load
Unit Cell |Unit Cell Packed
2x2x2 |3x3x3 |4x4x4
Show
Big Balls |Small Balls |Just Balls |Spacefill
Polyhedra Off |Si Polyhedra |All Polyhedra
Remove metal-metal sticks
Display Options
Black Background |White Background
Perspective On |Perspective Off
2D |Stereo |Red-Blue |Red-Cyan
View
CIF File Best |x |y |z |a |b |c
Rotation
Stop |Start
Labels
Console Off |On |Grey |Yellow
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000871 | Hafnon | Speer J A, Cooper B J (1982) Crystal structure of synthetic hafnon, HfSiO4, comparison with zircon and the actinide orthosilicates American Mineralogist 67 804-808 |  |
1982 | 0 | 293 |
CIF Raw Data - click here to close
General Appearance of Type Material:
Zones in transparent, orange red colored, grain-zized fragments of euhedral zircon crystals with a high density.
Geological Setting of Type Material:
Heavy mineral concentrates from a tantalum-bearing granitic pegmatite.
Associated Minerals at Type Locality:
Reference:
Correia Neves, J.M., Lopes Nunes, J.E., Sahama, T.G. (1974) High hafnium members of the zircon-hafnon series from the granite pegmatites of Zambézia, Mozambique. Contributions to Mineralogy and Petrology: 48: 73-80.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Australia | |
|---|---|
| Western Australia Yilgarn shire Mount Holland pegmatite field ⓘ Forrestania Rubellite pegmatite | M Jacobson +2 other references |
| Canada | |
| Manitoba Lac-du-Bonnet area Bernic Lake ⓘ Tanco Mine | Černý et al. (1977) +1 other reference |
| Ontario Renfrew County Brudenell-Lyndoch-and-Raglan Lyndoch Township Quadeville area ⓘ Beryl Pit ? | Verified Scott Ercit |
| Québec Outaouais Les Collines-de-l'Outaouais RCM Val-des-Monts Saint-Pierre-de-Wakefield Lake Saint-Pierre ⓘ Leduc Mine | Rock & Min. 82 +1 other reference |
| China | |
| Xinjiang Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture) Aletai Prefecture (Altay Prefecture) Fuyun Co. (Koktokay Co.) Koktokay pegmatite field (Keketuohai pegmatite field) ⓘ Koktokay No. 1 pegmatite | Yin et al. (2013) +1 other reference |
| Morocco | |
| Marrakesh-Safi Region Rehamna Province Sidi Bou Othmane Cercle Jebilet Mtn (Djebilet Mtn) ⓘ Sidi Bou Othmane | Fontan (1978) |
| Mozambique | |
| Zambezia Province ⓘ Alto Ligonha Pegmatite Field | Wilson et al. (2000) |
| Alto Mólocuè District ⓘ Moneia Mine ? | Neves et al. (1974) |
| ⓘ Morro Conco mine ? | Neves et al. (1974) |
| Gilé District Muiane-Naipa group ⓘ Muiâne pegmatite (Muiâne mine; Emdal mines) (TL) | Neves et al. (1974) +1 other reference |
| ⓘ Naipa mine ? | Wolfgang Henckel |
| Russia | |
| Murmansk Oblast Voron'i Tundry ⓘ Vasin-Myl'k Mt | Kudryashov et al. (2020) |
| USA | |
| North Carolina Yancey County Burnsville Hurricane Mountain ⓘ Ray Mica Mine |
"Mineralogy of the Ray Mica Mine |
| Zimbabwe | |
| Masvingo Bikita District ⓘ Bikita pegmatite | Černý et al. (2003) |
| ⓘ Mdara Mine | J. W. Anthony et al.: Handbook of Mineralogy (1997) |