Crystallized glass

Patent Granted PROBLEM TO BE SOLVED: To provide glass having transparency which can be preferably used as a material efficiently producing crystallized glass that can selectively crystalize a titanium oxide while sufficiently preventing the deposition of an Al<SB>4</SB>B<SB>2</SB>O<SB>9</SB>crystal and can exhibit a sufficiently high photocatalytic function, crystallized glass with deposited titanium oxide crystal which can be obtained using the glass, a producing method of the crystalized glass, and a photocatalyst member.