Xiyuantou of Fujian, Ghina is the third place where kulanite is discovered in the world. The kulanite has been found in granitic pegmatite of Ms-Ab-印 type in Xiyuantou. Kulanite , replaces in part montebrasite in the form of disseminated and irregular assemblage or occurs in fractures of quartz-montebra- site assemblage. The associated minerals include augelite, palermoite, goyazite, lazulite, triphylite, apatite, quartz and so on. Kulanite chiefly occurs as irregular fine-grained aggrogates, and some as tablets. Yellow-green or dark-green in .color. The lustre is vitreous. Conchoidal fracture, hardness (Vickers):810.3 Kg/mm. Specific, gravity:3.973-3.997 (obs.), 4.O1( calc.).Biaxial(+)，2V (mean)=34°.Weak pleochroism, Ng=1.722-brownish green, Nm=1.705-bluish green, Np=1.701-yellowish green. Absorption:Ng> Nm >Np, Nm=b, c∧Ng=11. X-ray powder diffraction data are given in table 1. X-ray single crystal study shows it to be monoclinic, space group: P21, or P21/m, unit cell a0=9.024 (A)，b0=12.079(A)，c0=4.924(A)，β=100.462, V=527.76(A3)，andZ = 2. Chemical analysis, data are given in table 3 and are compared with those of penikisite and bjarebyite. The chemical formula is Ba1.04 (Fe2+0.97Mn0.54Mg0.28 Ca0.08Na0.02 k0.01)1.90(Al2.04 Fe3+0.03)2.07 [P3.90Si0.13)3.03O12] (OH2.96F0.01)2.97 IR absorption curve includes three principal absorption zones at 3200-3600 cm-1, 1193-833 cm-1 and 660一431.5 cm-1. DTA curves has one strong endothermic peak at 700℃.