The present invention provides a novel crystal of a compound A, the novel crystal being usable as a pharmaceutical product. Provided is a IV-type crystal of calcium (R)-(-)-3-[3-(1-tert-butylcarbonylmethyl-2-oxo-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-3-yl)ureido]benzoate characterized by having characteristic peaks at diffraction angles (2[Theta] ± 0.2 DEG) of 7.94 DEG, 8.50 DEG, 10.27 DEG, 12.30 DEG, 12.83 DEG, 13.93 DEG, 17.19 DEG, 19.04 DEG, 20.57 DEG, and 23.94 DEG in a powder X-ray diffraction spectrum.本發明提供一種能夠用作醫藥品之化合物A之新穎結晶。 一種(R)-(-)-3-[3-(1-第三丁基羰基甲基-2-側氧基-5-環己基-1,3,4,5-四氫-2H-1,5-苯并二氮呯-3-基)脲基]苯甲酸鈣之IV型結晶,其特徵在於:於粉末X線繞射光譜中,具有繞射角(2θ±0.2°)為7.94°、8.50°、10.27°、12.30°、12.83°、13.93°、17.19°、19.04°、20.57°及23.94°之特徵性波峰。無
