In principle, contact angles can have any value between 0° and 180°. Materials scientists working with inorganic materials at high temperature tend to distinguish between two types of systems, “good wetting” systems whereθY< 90°, and “bad wetting” systems,θY> 90°. This nomenclature ...
It is perhaps a bit unfortunate that Pyrite’s major claim to fame is its nickname, “Fool’s Gold”, because of its similarity to the valuable metal and because they are often found together. From the likes of Sir Martin Frobisher and Sir Walter Raleigh, early explorers of North America,...