Page:EB1911 - Volume 18.djvu/539

 . . . . . . Ilmenite FeTiO3 R4 c. Intermediate Oxides. Spinel   MgAl2O4      C Magnetite  FeFe2O4 .... C Franklinite (Fe, Zn, Mn)(Fe, Mn)gO4  C Chromite   (Fe, Mg)(Cr, Fe)2O4   C Chrysoberyl  BeAl2O4 .... O (Alexandrite, Cymophane) d. Dioxides Cassiterite S11O2  T Rutile   TiO2  T Anatase  TiO2  T Brookite   TiO2   O Pyrolusite   MnO2    P Pitchblende  (U, Th)O2   C B. Hydrous Oxides. Diaspore  AlO(OH)     O Goethite   FeO(OH)     O Manganite  MnO(OH) .. O Limonite Fe2O3.3H2O    Amorphous Bauxite. Al2O3.2H2O? Brucite Mg(OH)2. R Psilomelane  xMnO2+yBaO-I-HQO Amorphous (Wad) VI.—OXYGEN SALTS. I.. A. Anhydrous. Calcite ... CaCO3 R (Satin-spar) Dolomite  CaMg(CO3)2    R4 Ankerite   Ca(Mg, Fe)(CO3)2  R Magnesite  MgCO3    R Chalybite   FeCO3    R Rhodochrosite. MnCO3 R Calamine. ZnCO3  R Aragonite    CaCO3   O Alstonite  (Ca, Ba)CO3  O Witherite   BaCO3   O Strontianite  SrCO3    O Cerussite   PbCO3 .. O Barytocalcite CaBa(CO3)2  M Parisite   (CcF)2Ca(CO3)3  H Phosgenite  (PbCl)2CO3   T B. Basic Carbonates. Malachite  Cu2(gH)2CO3  M Azurite    Cu3 H 2 CO3 2 M 2.. A. Anhydrous Silicates. a. Disilicates, R″Si1O5; Pol;/silicates, R"Si3Og Petalite  LiAl (Si2O5)z   M Orthoclase  KAlSi3Og    M (Moon-stone) Microcline  KAlS13O8    A (Amazon-stone) Albite    NaAlS1;, Og    A Oligoclase   Ab6An1 to Ab3An1  A (Sun-stone) Andesine   Ab3An1 to Ab1An1  A Labradorite  Ab1An1 to Ab1An3  A BytoWnite  Ab1An3 to Ab1An6  A Anorthite      CaAl2Si2O8 b Metasilicates, R″ SiO3. Leucite   KAl(SiO32    Pseudo-C Pollux    H2Cs4Al4(SiO3)9    C Enstatite MgSiO3 .   O Bronzite   (Mg, Fe)SiO3   O Hypersthene  (Fe, Mg)S1O3   O Diopside   CaMg(SiO3)2 .... M Augite  .  3 Ca(Mg, Fe) (SiO3)2   M &emsp;(Diallage) § 1tPh(M§ éF5)§ Al, Fe)2SiO¢ M Acmite   a e”' i 32 Spodumene  .  LiAl(SiO3)2    . M &emsp;(Hiddenite, Kunzite) Jadeite  NaAl(SiO3)2  M Wollastonite    CaSiO3    M Rhoddnite    MnSiO3    A Tremolite .... CaMg3(SiO3)4   M [Actmolite]   . Ca(Mg, Fe)3(S1O3)4  M (Asbestos, Nephrite) Ca(Mg, Fe)3(SiO3)4 Hornblende with NaAl(S1O3)¢   M and (Mg Fe) (Al, Fe)4(SiO5)2 Crocidolite gage   FeSiO3  % Beryl  Be3Al2(SiO3)6 (Aquamarine, Emerald) c. Intermediate. Iolite .... H2(Mg, Fe)4Al8Si10O37