Aldermanite from Tom's quarry in the Kapunda–Angaston area of the Mount Lofty Ranges, South Australia has been characterised by electron microprobe analyses and single-crystal structure analysis. The empirical formula is Na0.72K0.13Ca0.06Mg1.15Al2.92(PO4)2.05[(OH)2.92F2.96]Σ5.88⋅8.91H2O, based on 23 anions. Analysis of a specimen from the type locality, the nearby Klemm's quarry, Moculta, gave a similar formula, Na0.59K0.06Ca0.36Mg0.92Al3.16(PO4)1.97[(OH)4.08F2.70]Σ6.78⋅8.36H2O. Na and F were not analysed in the original description of the mineral. The ideal end-member formula is [Mg(H2O)6][Na(H2O)2Al3(PO4)2(OH)6]⋅H2O, compared to the original formula of Mg5Al12(PO4)8(OH)22⋅nH2O with n ≈ 32. Aldermanite is monoclinic, P21/c with a = 13.524(3), b = 9.958(2), c = 7.013(1) Å and β = 97.40(3)°. The crystal structure of aldermanite is built from sawtooth layers of cis- and trans-corner-connected, Al-centred octahedra, decorated with corner-connected PO4 tetrahedra to give (100) layers of composition Al3(PO4)2(OH,F)6. Interlayer Mg(H2O)6 octahedra and H2O molecules hold the layers together through H bonding. The corner-connected octahedra form 6-membered rings that are centred by 8-coordinated Na and have a topology identical to a 3-octahedra-wide {110} slice of the pyrochlore structure. This pyrochlore element contains intersecting kagomé nets of Al atoms, parallel to (111) and (11$\bar{1}$) of cubic pyrochlore. Minerals of the walentaite group, as well as zirconolite-3O polytypes have the same type of intersecting kagomé nets of small cations.

来自南澳大利亚洛夫蒂山脉 Kapunda-Angaston 地区 Tom's 采石场的 Aldermanite 已通过电子微探针分析和单晶结构分析进行了表征。经验公式为 Na 0.72 K 0.13 Ca 0.06 Mg 1.15 Al 2.92 (PO 4 ) 2.05 [(OH) 2.92 F 2.96 ] Σ5.88 ⋅8.91H 2 O，基于 23 个阴离子。对来自附近 Klemm's 采石场 Moculta 的标本进行分析，得出类似的公式 Na 0.59 K 0.06 Ca 0.36 Mg 0.92 Al3.16 (PO 4 ) 1.97 [(OH) 4.08 F 2.70 ] Σ6.78 ⋅8.36H 2 O。Na和F 在矿物的原始描述中没有分析。理想的端元分子式为 [Mg(H 2 O) 6 ][Na(H 2 O) 2 Al 3 (PO 4 ) 2 (OH) 6 ]⋅H 2 O，与 Mg 5 Al的原始分子式相比12 (PO 4 ) 8 (OH) 22 ⋅ n H 2 O 与n ≈ 32。Aldermanite是单斜晶系，P 2 1 / c，a = 13.524(3), b = 9.958(2), c = 7.013(1) Å 和 β = 97.40(3)°。Aldermanite 的晶体结构由顺式和反式角连接、以铝为中心的八面体的锯齿层构成，饰以角连接的 PO 4四面体以提供 (100) 层组成的 Al 3 (PO 4 ) 2 (OH ,F) 6 . 夹层 Mg(H 2 O) 6八面体和 H 2O 分子通过 H 键将各层固定在一起。角连接的八面体形成以 8 配位 Na 为中心的 6 元环，其拓扑结构与烧绿石结构的 3 八面体宽 {110} 切片相同。这种烧绿石元素包含铝原子的交叉 kagomé 网，平行于立方烧绿石的(111) 和 (11 $\bar{1}$ )。walentaite 组的矿物以及 zirconolite-3 O多型体具有相同类型的交叉小阳离子kagomé网。