The crystal structure of uralolite, Ca₂Be₄(PO₄)₃(OH)₃·5H₂O, from the spodumene deposit of Weinebene, Carinthia, Austria, has been refined with X-ray single crystal data gathered on a CCD diffractometer. Uralolite is monoclinic, space group P2₁/n, a = 6.553(1), b = 16.005(3), c = 15.979(3) Å, β = 101.63(1)°, V = 1641.5(5) ų. While previously only isotropic displacement parameters and no hydrogen atom positions were reported for uralolite, now anisotropic displacement parameters were used for non-hydrogen atoms and hydrogen atoms were located and refined yielding R₁ = 0.038 for 3909 observed reflections. Uralolite is built up from corrugated layers [Be₄(PO₄)₃(OH)₃]^4- parallel to (010), which contain Z-shaped groups of four BeO₄ tetrahedra sharing corners via three OH groups and are further crosslinked by PO₄ tetrahedra. Two Ca atoms in Ca(O_phosphate)₅(H₂O)₂ coordination and an interstitial water molecule link these layers along [010]. The OH groups and the Ca-bonded H₂O molecules are all involved in hydrogen bonds with O···O distances of 2.780(2) − 3.063(2) Å and O-H···O angles of 150(1) − 179(1)° excluding a bifurcated bond. The interstitial water molecule displays a distorted tetrahedral environment of O atoms and accepts and donates each two hydrogen bonds. The crystal structure exhibits a C2/c pseudosymmetry for the [Be₄(PO₄)₃(OH)₃]^4- layers and the Ca atoms. However, the disposition of the water molecules and an asymmetric hydrogen bond pattern involving OH groups as well as H₂O molecules are decisive for the lowering of the symmetry of the structure to the true space group P2₁/n.

_{乌拉洛石 Ca 2} Be ₄ (PO ₄ ) ₃ (OH) ₃ ·5H ₂ O的晶体结构来自奥地利克恩顿州 Weinebene 的锂辉石矿床，已使用在 CCD 衍射仪上收集的 X 射线单晶数据进行了精炼. 乌拉石为单斜晶系，空间群P 2 ₁ / n , a  = 6.553(1), b  = 16.005(3), c  = 15.979(3) Å, β  = 101.63(1)°, V  = 1641.5(5) Å ³. 虽然以前仅报告了乌拉石的各向同性位移参数并且没有氢原子位置，但现在各向异性位移参数用于非氢原子，并且氢原子被定位和精化，对于 3909 个观察到的反射，R 1  = 0.038 _{。乌拉洛石由平行于 (010) 的 [Be 4} (PO ₄ ) ₃ (OH) ₃ ] ^4-波纹层构成，其中包含四个 BeO ₄四面体通过三个 OH 基团共享角的 Z 形基团，并进一步交联PO ₄四面体。Ca(O _phosphate ) ₅ (H ₂ O)中的两个 Ca 原子₂配位和间隙水分子沿着 [010] 连接这些层。OH基团和与Ca键合的H ₂ O分子均参与氢键，O···O距离为2.780(2) − 3.063(2) Å，OH···O角为150(1) − 179 (1)° 不包括分叉键。间隙水分子显示出 O 原子的扭曲四面体环境，并接受并提供每两个氢键。[Be ₄ (PO ₄ ) ₃ (OH) ₃ ] ^4-的晶体结构表现出C 2 / c伪对称性层和 Ca 原子。然而，水分子的分布和涉及 OH 基团以及 H ₂ O 分子的不对称氢键模式对于降低结构的对称性至真实空间群P 2 ₁ / n 是决定性的。