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HandWiki. Plagioclase. Encyclopedia. Available online: https://encyclopedia.pub/entry/36581 (accessed on 03 October 2026).
HandWiki. Plagioclase. Encyclopedia. Available at: https://encyclopedia.pub/entry/36581. Accessed October 03, 2026.
HandWiki. "Plagioclase" Encyclopedia, https://encyclopedia.pub/entry/36581 (accessed October 03, 2026).
HandWiki. (2022, November 25). Plagioclase. In Encyclopedia. https://encyclopedia.pub/entry/36581
HandWiki. "Plagioclase." Encyclopedia. Web. 25 November, 2022.
Plagioclase
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The content is sourced from: https://handwiki.org/wiki/Chemistry:Plagioclase

Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series. This was first shown by the German mineralogist Johann Friedrich Christian Hessel (1796–1872) in 1826. The series ranges from albite to anorthite endmembers (with respective compositions NaAlSi3O8 to CaAl2Si2O8), where sodium and calcium atoms can substitute for each other in the mineral's crystal lattice structure. Plagioclase in hand samples is often identified by its polysynthetic crystal twinning or 'record-groove' effect. Plagioclase is a major constituent mineral in the Earth's crust, and is consequently an important diagnostic tool in petrology for identifying the composition, origin and evolution of igneous rocks. Plagioclase is also a major constituent of rock in the highlands of the Moon. Analysis of thermal emission spectra from the surface of Mars suggests that plagioclase is the most abundant mineral in the crust of Mars. Its name comes from Ancient Greek plágios (πλάγιος 'oblique') + klásis ((κλάσις 'fracture'), in reference to its two cleavage angles.

tectosilicate plagioclase thermal emission

References

  1. Nesse, William D. (2000). Introduction to mineralogy. New York: Oxford University Press. p. 219. ISBN 9780195106916. 
  2. Klein, Cornelis; Hurlbut, Cornelius S., Jr. (1993). Manual of mineralogy : (after James D. Dana) (21st ed.). New York: Wiley. p. 543. ISBN 047157452X. 
  3. Klein & Hurlbut 1993, p. 542.
  4. Allaby, Michael (2013). "plagioclase". A dictionary of geology and earth sciences (Fourth ed.). Oxford: Oxford University Press. ISBN 9780199653065. 
  5. Jackson, Julia A., ed (1997). "plagioclase". Glossary of geology. (Fourth ed.). Alexandria, Viriginia: American Geological Institute. ISBN 0922152349. 
  6. Sinkankas, John (1964). Mineralogy for amateurs.. Princeton, N.J.: Van Nostrand. p. 450. ISBN 0442276249. 
  7. Nesse 2000, pp. 208-209.
  8. Nesse 2000, p. 216.
  9. Sinkankas 1964, p. 457.
  10. Klein & Hurlbut 1993, p. 541.
  11. Nesse 2000, p. 215.
  12. Sinkankas 1964, pp. 456-457.
  13. Sinkankas 1964, p. 450.
  14. Nesse 2000, p. 209.
  15. Nesse 2000, p. 217-219.
  16. anorthite (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=anorthite  (Subscription or UK public library membership required.)
  17. Deer, W.A., Howie, R.A. and Zussman, J. (1966). An Introduction to the Rock Forming Minerals. London: Longman. pp. 336. ISBN 0-582-44210-9. 
  18. albite (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=albite  (Subscription or UK public library membership required.)
  19. Jackson 1997, albite.
  20. Klein, Hurlbut & 1993), p. 568.
  21. bytownite (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=bytownite  (Subscription or UK public library membership required.)
  22. Klein & Hurlbut 1993, p. 543.
  23. Nesse 2000, p. 213.
  24. Michael O'Donoghue, Gems, Butterworth-Heinemann, 6th ed., 2006, pp. 238-267, ISBN:0-7506-5856-8
  25. Walter Schumann, Gemstones of the World, Sterling, 3rd ed., 2007, pp. 52 - 53, 182 ISBN:1-4027-4016-6
  26. oligoclase (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=oligoclase  (Subscription or UK public library membership required.)
  27. Le Bas, M. J.; Streckeisen, A. L. (1991). "The IUGS systematics of igneous rocks". Journal of the Geological Society 148 (5): 825–833. doi:10.1144/gsjgs.148.5.0825. Bibcode: 1991JGSoc.148..825L.  https://dx.doi.org/10.1144%2Fgsjgs.148.5.0825
  28. "Rock Classification Scheme - Vol 1 - Igneous". British Geological Survey: Rock Classification Scheme 1: 1–52. 1999. http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf. 
  29. Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. pp. 139–143. ISBN 978-0-521-88006-0. 
  30. Boggs, Sam (2006). Principles of sedimentology and stratigraphy (4th ed.). Upper Saddle River, N.J.: Pearson Prentice Hall. pp. 120–121. ISBN 0131547283. 
  31. Leeder, M. R. (2011). Sedimentology and sedimentary basins : from turbulence to tectonics (2nd ed.). Chichester, West Sussex, UK: Wiley-Blackwell. pp. 10–11. ISBN 9781405177832. 
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