A mineral texture in feldspar where small crystals of potassium feldspar are distributed within sodium feldspar, opposite to the normal perthite pattern.
From 'anti-' (opposite) and 'perthite' (a feldspar intergrowth pattern named after Perth, Scotland). The term emerged in mineralogy to describe the reverse of typical feldspar intergrowth patterns.
Antiperthite in granite tells geologists a fascinating story—it reveals how cooling rocks can unmix their minerals in reverse, like watching a bad marriage dissolve at the atomic level.
Complete word intelligence in one call. Free tier — 50 lookups/day.