Glass-ceramic with specific thermal expansion behavior

LAS glass-ceramic, which has a mean thermal expansion coefficient CTE in the range of 0 to 50° C. of at most 0±0.02×10−6/K and a thermal hysteresis of <0.1 ppm at least in the temperature range of 10° C. to 35° C. and which comprises the following components (in mol % based on oxide):

• SiO2 60-70
• Li2O 7-9.4
• R2O (with R═Na, K, Cs, Rb) 0.7-2.0
• MgO + ZnO 0-0.4
• at least one component selected from the group consisting of P2O5 and RO, where RO is CaO and/or BaO and/or SrO, and
• nucleating agents with a content of 1.5 to 6 mol %, where the nucleating agents are at least one component selected from the group consisting of TiO2, ZrO2, Ta2O5, Nb2O5, SnO2, MoO3, and WO3.