A hard transparent material made
by heating calcium oxide (lime), sodium
carbonate, and sand (silicon(IV) oxide).
This produces a calcium silicate – the normal
type of glass, called soda glass. Special
types of glass can be obtained by incorporating
boron oxide in the glass (borosilicate
glass, used for laboratory apparatus)
or by including metals other than calcium,
e.g. lead or barium.
Glass is an amorphous substance, in the
sense that there is no long-range ordering
of the atoms on a lattice. It can be regarded
as a supercooled liquid, which has not crystallized.
Solids with similar noncrystalline
structures are also called glasses.
一般的な説明
Threaded to DIN ISO 4796. Studded base for stability and abrasion resistance. Graduated, with marking area. Screw cap and pouring ring PP. Autoclavable (121 °C).
