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Tourmaline foda
Tourmaline foda shi ne foda da aka samu ta hanyar injiniya na murkushe asalin tourmaline tama bayan cire datti.Gurasar tourmaline mai sarrafawa da tsarkakewa yana da haɓakar anion mafi girma da kuma iskar infrared mai nisa.Tourmaline kuma ana kiransa Tourmaline.Tsarin sinadarai na Tourmaline shine NaR3Al6Si6O18BO33 (OH, F.).4, crystal nasa ne na tsarin trigonal iyali na tsarin cyclic silicate ma'adanai a gaba ɗaya.A cikin dabarar, R yana wakiltar cation na ƙarfe.Lokacin da R shine Fe2 +, yana samar da baƙar fata tourmaline.Lu'ulu'u na Tourmaline suna cikin sifar kusan ginshiƙai uku, tare da siffofi daban-daban a ƙarshen duka.Rukunin suna da ratsi na tsayi, sau da yawa a cikin nau'in ginshiƙai, allura, radials, da manyan tari.Gilashi mai sheki, karyewar guduro mai sheki, translucent zuwa m.Babu tsaga.Taurin Mohs 7-7.5, takamaiman nauyi 2.98-3.20.Akwai piezoelectricity da pyroelectricity.
