APOPHYLLITE GROUP
MINERAL GROUPS guide
apophyllite
usually
fluorapophyllite
, also
hydroxyapophyllite
,
natroapophyllite
fluorapophyllite
KCa
4
Si
8
O
20
F
·8H
2
O
hydroxyapophyllite
KCa
4
Si
8
O
20
OH
·8H
2
O
natroapophyllite
NaCa
4
Si
8
O
20
F
·8H
2
O