环状结构硅酸盐晶体优秀课件.ppt

环状结构硅酸盐晶体第1页，本讲稿共13页Ring silicates Ring silicates are the compounds of the metallic cations with ring silicate radicals,which are the important of the Si(Al)6O18.Ring silicates are charecterized by the dominance of prismatic crystal form,high hardness,maderate denerate and lack of perfect cleavage.The minerals have been:Beryl Be3Al2Si6O18;Cordierite Mg2Al3Si5AlO18;Elbaite Na(Li,Al)3Al6Si6O18BO33(OH,F)4;Schorl NaFe3Al6Si6O18BO33(OH,F)4;Dravite NaMg3Al6Si6O18BO33(OH,F)4.第2页，本讲稿共13页绿柱石晶体Beryl(18x15x6)第3页，本讲稿共13页绿柱石晶体 Beryl第4页，本讲稿共13页海兰宝石晶体Aquamarine(6x3x2)第5页，本讲稿共13页绿柱石晶体 Beryl第6页，本讲稿共13页绿电气石晶体Elbaite(5x2)第7页，本讲稿共13页放射状镁电气石晶体Dravite(h6cm)第8页，本讲稿共13页锂电气石晶体Elbaite(h6cm)第9页，本讲稿共13页紫电气石晶体Elbaite第10页，本讲稿共13页第1 1页，本讲稿共13页黑电气石晶体 Schorl(9x2x2)第12页，本讲稿共13页黑电气石晶体Schorl(10 x2)第13页，本讲稿共13页