Fig. 4.-Swapped intergranular albite (Ab
1single prime,
Ab
2single prime)
at contact
of two K-feldspars (K1,
K2)
Relict
(bridge like) of perthitic albite is formed in the replacive albite Ab
1single prime.
Crossed polars plus quartz plate. Sanchakou leucogranite,
Hebei
Province.