IV.
  a.  Beryl [...Be][...Si]^{2} + [...Al=][...Si]^{2}
  b.  Diallage ([.Ca][.Mg][.Fe])^{3}([...Si][...Al=])^{2}
     Hypersthene ([.Mg][.Fe])^{3}[...Si]^{2} |
  c.  Fuchsite ([.K]^{5}[...Si])^{2} +
                    9([...Al=][...Cr=])^{6}[...Si]^{6}
V.
  a.  Leucite [.K]^{3}[...Si]^{2} + [...Al=][...Si]^{2}
  b.  Chondrodite ([.Mg],[.Mg]F)^{4}([...Si]SiF^{3})
     Olivine ([.Mg][.Fe][.Ca])^{2}[...Si]
  c.  Andalusite ([...Al=]Fe)^{3}[...Si]^{2}
     Chrysoberyl [...Be] + [...Al=]
     Kaynite [...Al=]^{3}[...Si]^{2}
     Pycnite 6[...Al=]^{3}[...Si]^{2} + (3[...Al=]F^{3} +
                    2[...Si]F^{3})
     Topaz 6[...Al=]^{3}[...Si]^{2} + (3[...Al=]F^{3} +
                    2[...Si]F^{3})
     Zircon [...Zr=][...Si]
     Staurolite ([...Al=]Fe)^{2}[...Si]
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Hydrous Silicates.
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Fus. alone and with NaC.

Mineral.                  Formula.
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I.
a.  Analcime     [.Na]^{3}[...Si]^{2} + 3[...Al=][...Si]^{2}
+ 6[.H]                                         Int. 
Apophyllite  ([.K], KF)([...Si], SiF^{3}) + 6[.Ca][...Si] +
15[.H]                                          Int. 
Brewsterite  ([.Sr][.Ba])[...Si] + [...Al=][...Si]^{3} + 5[.H] Int. 
Chabasite    ([.Ca],[.Na],[.K])^{3}[...Si] +
3[...Al=][...Si]^{2} + 18[.H]                   Int. 
Lapis Lazuli [...Si],[...S],[...Al=], Fe, [.Ca], [.Na], [.H]
Laumonite    [.Ca]^{3}[...Si]^{2} + 3[...Al=][...Si]^{2}
+ 12[.H]                                        Int. 
Mesotype     ([.Na][.Ca])[...Si] + [...Al=][...Si] + 3[.H]     Int. 
Natrolite    [.Na][...Si] + [...Al=][...Si] + 2[.H]            Int. 
Prehnite     [.Ca]^{2}[...Si] + [...Al=][...Si] + [.H]         Int. 
Scolezite    [.Ca][...Si] + [...Al=][...Si] + 3[.H]            Int. 
Thomsonite   ([.Ca][.Na])^{3}[...Si] + 3[...Al=][...Si]
+ 7[.H]                                         Int. 
Datholite    2[.Ca]^{3}[...Si] + [...B]^{3}[...Si]^{2} + 3[.H] Int. 
Heulandite   [.Ca][...Si] + [...Al=][...Si]^{3} + 5[.H]        Int. 
Stilbite     [.Ca][...Si] + [...Al=][...Si]^{3} + 6[.H]        Int.
b.  Okenite      [.Ca]^{3}[...Si]^{4} + 6[.H]                      Int. 
Pectolite    ([.Ca][.Na])^{4}[...Si]^{3} + [.H]                Int.
c.  Saponite     2[.Mg]^{3}[...Si]^{2} + [...Al=][...Si]
+ 10 or 6[.H]
II.
a.  Antrimolite  3([.Ca][.K])[...Si] + 5[...Al=][...Si] +
15[.H]
Harmatome    [...Ba][...Si] + [...Al=]S^{2} + 5[.H]
b.  Brevicite    [.Na][...Si] + [...Al=][...Si] + 2[.H]
Orthite      [.R]^{3}[...Si] + [...R=][...Si] + ([.H]?)        Int.

III.
  c.  Pitchstone [...Si],[...Al=], Fe, [.Mg][.Na], [.K][.H]
     Talc to V. [.Mg]^{6}[...Si]^{5} + 2[.H]
     Chlorite 3([.Mg]Fe)^{3}[...Si] + ([...Al=]Fe)^{2}[...Si]
                    + 9[.H]
     Pinite [...Si],[...Al=],[.Fe],[.K],[.Mg],[.H]