The talc is the water-containing magnesium silicate with the following theoretical chemical composition:
with theoretical content:
The newer way of recording in mineralogy is:
As for mineralogical point of view, the talc belongs to the group of “phyllosilicates“ i.e. the bedded silicates, in which, when arranging the tetrahedrite SiO4, the endless two-dimensional tetrahedrite beds arise, which justify the laminar structure of these minerals.
The application of talc follows from its functional attributes that are mostly naturally noticeable in the pure state.
The talc belongs to rock-forming minerals and is much expanded in sediments – sedimentary rocks or metamorphic rocks. In many iron-ore as well as carbonate deposits, the talc is represented as more or less undesired accompanying mineral.