A new mineral species, guangyuanite, ideally Pb3Cl3(Se4+O3)(OH), was discovered from the El Dragón mine, Antonio Quijarro Province, Potosí Department, Bolivia. It occurs as equant crystals. Associated minerals are Co-bearing krut'aite–penroseite, chalcomenite, schmiederite, olsacherite, phosgenite, anglesite, cerussite and franksousaite. Guangyuanite is pale yellow–brown in transmitted light, transparent with white streak and vitreous lustre. It is brittle and has a Mohs hardness of ~3. No parting or cleavage was observed. The calculated density is 7.63 g/cm3. An electron microprobe analysis yielded an empirical formula [based on 7 (O + Cl) atoms per formula unit] of Pb3.02Cl3.01(Se4+0.99O3)(OH), which can be simplified to Pb3Cl3(Se4+O3)(OH).

Guangyuanite is isostructural with synthetic Pb3Br3(Se4+O3)(OH). It is orthorhombic, with space group Pnma and unit-cell parameters a = 11.0003(5), b = 10.6460(5), c = 7.7902 Å, V = 912.31(6) Å3 and Z = 4. The crystal structure of guangyuanite contains two symmetrically-distinct Pb (Pb1 and Pb2) cations, with Pb1 coordinated by eight anions (4O + 4Cl) and Pb2 only by six anions (3O + 3Cl), forming a marked lopsided coordination typical of Pb2+ with a stereochemically active 6s2 lone electron pair. The Se4+ cation forms a typical [Se4+O3] trigonal pyramid. The crystal structure of guangyuanite can be described as consisting of layers of edge-sharing [Pb1O4Cl4] polyhedra parallel to (100). These layers are linked together by sharing polyhedral corners (Cl atoms), as well as [Pb2O3Cl3] and [Se4+O3] groups. Chemically, guangyuanite is one of six lead chloride selenite minerals reported thus far and closely related to orlandiite Pb3Cl4(Se4+O3)⋅H2O.

在玻利维亚波托西省安东尼奥基哈罗省的 El Dragón 矿中发现了一种新矿物，广源石，理想情况下是 Pb 3 Cl 3 (Se 4+ O 3 )(OH)。它以等晶体形式出现。伴生矿物有钴锰矿、辉铜矿、辉铜矿、铁锰矿、橄榄石、光水银矿、角铁矿、白铅矿和弗兰克苏赛石。广源石在透射光下呈淡黄棕色，透明，有白色条纹，有玻璃光泽。它很脆，莫氏硬度约为 3。没有观察到分离或解理。计算出的密度为7.63g/cm 3。电子探针分析得出了 Pb 3.02 Cl 3.01 (Se 4+ 0.99 O 3 )(OH)的经验式 [基于每个式单元 7 个 (O + Cl) 原子] ，可简化为 Pb 3 Cl 3 (Se 4+ O 3 )(OH)。

广源石与合成的Pb 3 Br 3 (Se 4+ O 3 )(OH)同构。它是斜方晶系，空间群为Pnma，晶胞参数为a = 11.0003(5)、b = 10.6460(5)、c = 7.7902 Å、V = 912.31(6) Å 3和Z = 4。 广源石的晶体结构含有两个对称不同的 Pb（Pb1 和 Pb2）阳离子，其中 Pb1 由 8 个阴离子 (4O + 4Cl) 配位，Pb2 仅由 6 个阴离子 (3O + 3Cl) 配位，形成具有立体化学活性的 Pb 2+典型的明显不平衡配位6s 2孤电子对。Se 4+阳离子形成典型的[Se 4+ O 3 ]三棱锥。广源石的晶体结构可以描述为由平行于(100)的共边[Pb1O 4 Cl 4 ]多面体层组成。这些层通过共享多面体角（Cl原子）以及[Pb2O 3 Cl 3 ]和[Se 4+ O 3 ]基团连接在一起。从化学角度看，广源石是迄今为止报道的六种氯化铅亚硒酸盐矿物之一，与奥兰石Pb 3 Cl 4 (Se 4+ O 3 )⋅H 2 O密切相关。