text: In geomelting, radioactive waste is turned into this type of material.
full_question: In geomelting, radioactive waste is turned into this type of material. Lyophilization of pharmaceuticals occurs at a temperature named for this material. At that temperature, polymers supercooled beyond the "rubber" state transition into a state named for this material. Sensitive pH electrodes are made out of this material. Primary network formers of this substance, like phosphorous oxide, have a decreased melting point because of fluxes, like (*) potash. Hydrofluoric acid reacts with this material to give silicon fluorides. Boric oxide is mixed into this material to prevent thermal expansion. It consists of amorphous silicon oxide. For 10 points, name this material used to make Pyrex beakers and flasks.
first_sentence: In geomelting, radioactive waste is turned into this type of material.
raw_answer: glasses [or spin glasses; or glass transition temperature; or glass electrodes] 