344 



CHEMICAL COMPOSITION OF MINERALS, 



Celestine (110), 



Sr§ 



Strontianite (111), 



SrC 



Gypsum (112), 



CaS-f-23 



Anhydrite (114), 



Ca§ 



Calcite (115), 



CaC 



Aragonite (118), 



CaO 



Dolomite (119), 



(Ca, Mg)0 



Apatite (120), 



Ca3P+£Ca(Cl, F) 



Fluor spar (121), 



CaF 



Epsomite (Epsom salt, 124), 



STgS+7H 



Magnesite (124), 



M g c 



Brucite (125), 



MgH 



Boracite (126), 



Mg3B 4 



Potash alum (127), 



£3+XlS*+24fl 



Soda alum (128), 



&a8"-f-£lS 3 4-24H 



Alunite (129), 



&S+3AHS+6H 



Wavellite (130), 



(^l 4 P 3 + 18H)+iAlF« 



Gibbsite (131), 



^1H3 



Quartz (132), 



Si 



Opal (139), 



Si(+Aq.) 



Wollastonite (141), 



Ca 3 Si 3 



Datholite (142). 



(Ca s , H 3 , B)Si* 



Talc (143), 



3ig6Si5-f2H 



Chlorite (145), 



(ft 3 , fi)Si*-f lifl 



Ripidolite (145), 



(ft', fi)Si*+iifi 



Serpentine (145), 



]VIg3Si 2 + ]iMgH2 



Meerschaum (148), 



Mg§i-fH? 



Clintonite (148), 



(R8,K)(Si, Xl^-HH 



Pyroxene (150), 



(Mg, Ca, Fe, Mn)*Si 2 



Hornblende (152), 



(Mg, Ca, Fe,M.n) 4 Si» 



Spodumene (156), 



(Li,Na) s Si 2 4-4^1§i» 



Chrysolite (157), 



(Mg, Fe, Ca)3§i 



Chondrodite (157), 



(%, Fe^Si 



Corundum (15S), 



£l 



Spinel (160), 



(%. XI) 



Automolite (var. of Spinel, 161), 



2n£l 



Hercinite, " 



Fe£l 



Ceylanite, " 



0"lg, Fe)& 



Dysluite, ■ 



(2n, Mn) (£l, 1?e) 



