Patent ID: 8580411

Claim:
A glass which comprises, as represented by mol % based on the following oxides, from 62.5 to 69% of SiO 2 , from 9 to 15.5% of Al 2 O 3 , from 8 to 16 of Li 2 O, from 0 to 8% of Na 2 O, from 0 to 7% of K 2 O and from 0 to 3.5% of ZrO 2 , provided that SiO 2 —Al 2 O 3 is at least 53.3% and at most 56.0%, Li 2 O+Na 2 O+K 2 O is from 17 to 24%, and the total of contents of the above six components is at least 97%.