tectosilicates (1:2) Flashcards
1
Q
tectosilicate groups
A
- silica group
- feldspathoid
- plagioclase feldspar
- alkaline (K-) feldspar
- zeolite
- scapolite
2
Q
silica group
A
- quartz
- chalcedony
- cristobalite
- stishobite
- tridymite
- coesite
- opal
3
Q
quartz
A
hexagonal; SiO2
4
Q
chalcedony
A
hexagonal; SiO2
5
Q
cristobalite
A
tetragonal, SiO2
6
Q
stishovite
A
tetragonal, SiO2
7
Q
tridymite
A
triclinic, SiO2
8
Q
coesite
A
monoclinic, SiO2
9
Q
opal
A
amorphous, SiO2 * nH2O
10
Q
feldspathoid group
A
- leucite
- nepheline
- sodalite
- lazurite
- petalite
11
Q
leucite
A
tetragonal, KAlSi2O6
12
Q
nepheline
A
hexagonal, NaAlSiO4
13
Q
sodalite
A
isometric, Na4(Si3Al3)O12Cl
14
Q
lazurite
A
isometric, Na7CaAl3Si3O12S
15
Q
petalite
A
monoclinic, LiAl(Si4O10)
16
Q
plagioclase group
A
- anorthite
- albite
17
Q
anorthite
A
triclinic, CaAl2Si2O8 (ca-rich)
18
Q
albite
A
triclinic, NaAlSi3O8 (na-rich)
19
Q
alkali-feldspar group
A
- microcline
- sanidine
- orthoclase
20
Q
microcline
A
triclinic, KAlSi3O8
21
Q
sanidine
A
monoclinic, KAlSi3O8
22
Q
orthoclase
A
monoclinic, KAlSi3O8
23
Q
scapolite group
A
- meionite
- marialite
- analcime
24
Q
meionite
A
tetragonal, Ca4Al6Si6O24CO3
25
marialite
tetragonal, NaAl3Si9O24Cl
26
analcime
triclinic, NaAlSi2O6 * H2O
27
zeolite group
1. natrolite
2. chabazite
3. heulandite
4. stilbite
5. laumonite
28
natrolite
orthorhombic, Na2Al2Si3O10 * 2H2O
29
chabazite
triclinic, CaAl2Si4O12 * 6H2O
30
heulandite
monoclinic, CaAl2Si7O18 * 6H2O
31
stilbite
monoclinic, CaAl2Si7O18 * 7H2O
32
laumonite
monoclinic, CaAl2Si4O12 * 4H2O
