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Yakubovich O V , Urusov V S , Geochemistry International , 35 (1997) p.630-638, The structure and electron density of Fe2+ -bearing tavorite in relation to the, genetic crystal chemistry of secondary phosphates of lithium pegmatites, Locality: synthetic
Crystalline - Fine - Occurs as well-formed fine sized crystals.
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
light green
Optical Properties of Tavorite
Gladstone-Dale:
CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2428,KPDmeas= 0.2474,KC= 0.262 Ncalc = 1.86 - 1.88