Английская Википедия:Hafnon
Hafnon is a hafnium nesosilicate mineral, chemical formula Шаблон:Chem2 or Шаблон:Chem2.[1] In natural zircon Шаблон:Chem2 part of the zirconium is replaced by the very similar hafnium and so natural zircon is never pure Шаблон:Chem2. A zircon with 100% hafnium substitution can be made synthetically and is hafnon.
Hafnon occurs as transparent red to red orange tetragonal crystals with a hardness of 7.5.[2][3]
Hafnon occurs naturally in tantalum-bearing granite pegmatites in the Zambezia district, Mozambique and in weathered pegmatites at Mount Holland, Western Australia.[4] It has also been reported from locations in Ontario, Quebec and Manitoba, Canada; North Carolina, United States; and in Zimbabwe.[2]
References
- Emsley, John. Nature's Building Blocks. Oxford, 2001. Шаблон:ISBN
- Шаблон:Cite journal
- ↑ http://www.minerals.net/mineral/silicate/neso/zircon/hafnon.htm Minerals.net
- ↑ 2,0 2,1 http://www.mindat.org/min-1792.html Mindat
- ↑ Шаблон:Cite web
- ↑ http://www.handbookofmineralogy.org/pdfs/Hafnon.PDF Шаблон:Webarchive Handbook of Mineralogy
