The new högbomite-group mineral magnesiohögbomite-6N12S, ideally Mg5Al11TiO23(OH), was found in calcite “vein-dikes” at the DeWitts Corners occurrence, lots 10 and 11, concession 1, Bathurst Township, Ontario, Canada. It forms tabular and short-prismatic crystals up to 5 mm in size. The major forms are pinacoid {0001} and hexagonal pyramid {11${\bar 2}$1}, sometimes modified by hexagonal prism {11${\bar 2}$0}. The associated minerals are magnesiohögbomite-2N3S, spinel, corundum, diopside, magnesio-hastingsite, pargasite, clinochlore and calcite. Magnesiohögbomite-6N12S is dark brown to black with brown streak and vitreous lustre. It has no cleavage and its fracture is uneven. The Mohs hardness is 6½. Dcalc is 3.87 g/cm3. The infrared spectrum is reported. The composition (wt.%) is MgO 13.09, ZnO 0.46, FeO 11.91, Fe2O3 6.84, Al2O3 62.70, TiO2 4.44, H2O 0.99, total 100.43. The empirical formula calculated on the basis of 17 cations, excluding H+, is (Mg2.95Fe2+1.51Al0.49Zn0.05)Σ5(Al10.71Fe3+0.78Ti0.51)Σ12O23(OH). The simplified formula is (Mg,Fe)5(Al,Fe,Ti)12O23(OH). The mineral is trigonal, R${\bar 3}$m, a = 5.7194(2), c = 83.069(5) Å, V = 2353.3(2) Å3 and Z = 6. The strongest reflections of the powder X-ray diffraction pattern [d,Å(I)(hkl)] are: 2.921(26)(0.1.23), 2.863(49)(110), 2.687(29)(0.1.26), 2.547(31)(0.1.$\overline{28}$) and 2.434(100)(1.1.18). The crystal structure was solved and refined from single-crystal X-ray diffraction data to R1 = 0.022. It is composed of alternating spinel (S) and nolanite (N) modules in the sequence 3 × (NSSNSS). The sequence of cubic ‘c’ and hexagonal ‘h’ closed-packed oxygen layers is 3 × (cccccchcccch). It is the first polysome in the högbomite supergroup with such a sequence.

在 DeWitts Corners 矿区的方解石“脉脉”中发现了新的 högbomite 族矿物 magnesiohögbomite-6 N 12 S，理想情况下为 Mg 5 Al 11 TiO 23 (OH)，在 DeWitts Corners 矿区的方解石“脉脉”中发现，批次 10 和 11，特许权 1，Bathurst Township，加拿大安大略省。它形成最大 5 毫米的板状和短棱柱状晶体。主要形式是pinacoid {0001}和六棱锥{11 ${\bar 2}$ 1}，有时被六棱柱{11 ${\bar 2}$ 0}修饰。伴生矿物是 magnesiohögbomite-2 N 3 S、尖晶石、刚玉、透辉石、镁黑石、磷灰石、斜绿石和方解石。Magnesiohögbomite-6 N 12S为深棕色至黑色，有棕色条纹和玻璃光泽。它没有解理，断裂不均匀。莫氏硬度为 6½。D calc是3.87 g/cm 3。报告了红外光谱。组成(wt.％)为MgO 13.09、ZnO 0.46、FeO 11.91、Fe 2 O 3 6.84、Al 2 O 3 62.70、TiO 2 4.44、H 2 O 0.99，共计100.43。基于 17 个阳离子计算的经验公式，不包括 H +，为 (Mg 2.95 Fe 2+ 1.51 Al 0.49 Zn 0.05 ) Σ5 (Al 10.71Fe 3+ 0.78 Ti 0.51 ) Σ12 O 23 (OH)。简化公式为(Mg,Fe) 5 (Al,Fe,Ti) 12 O 23 (OH)。矿物呈三角型，R ${\bar 3}$ m, a = 5.7194(2), c = 83.069(5) Å, V = 2353.3(2) Å 3 and Z = 6. 粉末X的最强反射-射线衍射图 [ d ,Å( I )(hkl)] 为：2.921(26)(0.1.23), 2.863(49)(110), 2.687(29)(0.1.26), 2.547(31)( 0.1. $\overline{28}$) 和 2.434(100)(1.1.18)。晶体结构由单晶 X 射线衍射数据解析和精制至R 1 = 0.022。它由交替排列的尖晶石 ( S ) 和诺兰石 ( N ) 模块组成，顺序为 3 × ( NSSNSS)。立方' c '和六边形' h '密堆积氧层的序列是3 × ( cccccchcccch )。它是 högbomite 超群中第一个具有这种序列的多聚体。