Petalite

Source: Wikipedia, the free encyclopedia.
Petalite
2V angle
82–84° measured
Melting point1350 °C[2]
Fusibility5
SolubilityInsoluble
References[3][4][5][6]

Petalite, also known as castorite, is a

monoclinic system. Petalite occurs as colorless, pink, grey, yellow, yellow grey, to white tabular crystals and columnar masses. It occurs in lithium-bearing pegmatites with spodumene, lepidolite, and tourmaline. Petalite is an important ore of lithium, and is converted to spodumene and quartz by heating to ~500 °C and under 3 kbar of pressure in the presence of a dense hydrous alkali borosilicate fluid with a minor carbonate component.[7] Petalite (and secondary spodumene formed from it) is lower in iron than primary spodumene, making it a more useful source of lithium in, e.g., the production of glass. The colorless varieties are often used as gemstones. [citation needed
]

Discovery and occurrence

Petalite from Paprok, Nuristan Province, Afghanistan (size: 7.3 × 2.9 × 2.4 cm)

Petalite was discovered in 1800, by Brazilian naturalist and statesman

Stockholm, Sweden. The name is derived from the Greek word petalon, which means leaf, alluding to its perfect cleavage.[5][8][9]

Economic deposits of petalite are found near

Bikita, Zimbabwe
.

The first important economic application for petalite was as a raw material for the glass-ceramic cooking ware CorningWare.[citation needed] It has been used as a raw material for ceramic glazes.

References

  1. S2CID 235729616
    .
  2. ^ "Petalite". Digital Fire. Retrieved 23 October 2011.
  3. ^ Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (2005). "Petalite" (PDF). Handbook of Mineralogy. Mineral Data Publishing. Retrieved 14 March 2022.
  4. ^ Webmineral
  5. ^ a b Petalite, Mindat.org
  6. ISBN 0-471-80580-7
  7. ISBN 978-1-86239-144-4
    .
  8. D'Andraba (1800). "Des caractères et des propriétés de plusieurs nouveaux minérauxde Suède et de Norwège , avec quelques observations chimiques faites sur ces substances"
    . Journal de Physique, de Chimie, d'Histoire Naturelle, et des Arts. 51: 239.
  9. ^ Sowerby, James (1811). Exotic mineralogy: Or, Coloured figures of foreign minerals: As a supplement to British mineralogy.

External links

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