CH1012
                                         L1 /   
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                                         L1 /   
7
NETWORK SOLIDS II
at high T, P
® Borazon (abrasive)
both radar invisible!
Sheet (Layer) Silicates    [Si4O10]4- 
  O / Si ratio = 2.5: 1
oxygens of SiO44- 
2 shared, 2 bridging
eg. Mica (muscovite)
KAl2[AlSi3O10(OH)2]
Silica = hard,
insulator.  SiO2 quartz.
Boron Nitride BN