Nickelalumite, ideally NiAl₄(SO₄)(OH)₁₂(H₂O)₃, is a newly approved mineral from the Batken region, Kyrgyzstan, where it occurs in the Kara-Tangi and Kara-Chagyr uranium deposits. It formed in a zone of hydrothermal alteration of U–V-bearing carbonaceous siliceous schists, in association with quartz, calcite, alumohydrocalcite, allophane, crandallite, kyrgyzstanite, ankinovichite and an unknown Al–OH-mineral. It occurs as aggregates of colourless to pistachio-green radiating bladed crystals from 0.05 to 0.50 mm long. It is vitreous to transparent in thin flakes, has a white streak, and shows no fluorescence under long-wave or short-wave ultraviolet light. Cleavage is perfect parallel to {001} and no parting was observed. Mohs hardness is 2, it is brittle and has a splintery fracture. The calculated mass density is 2.231 g cm^–3. In transmitted plane-polarized white light, nickelalumite is non-pleochroic, biaxial, α = 1.542(2), γ = 1.533(2), β could not be measured due to the almost negligible thickness of the flakes. EPMA chemical analysis gave Al₂O₃ 39.94, SiO₂ 0.17, SO₃ 15.20, V₂O₃ 0.29, FeO 0.15, NiO 8.00, ZnO 6.21, (H₂O)_calc. 31.87, total 101.83 wt%, H₂O was determined by crystal-structure analysis, and the empirical formula is as follows: (Ni_0.55Zn_0.39V_0.02Fe_0.01)_Σ0.97(Al_3.99Si_0.01)_Σ4.00 (SO₄)(OH)₁₂(H₂O)₃ based on 4 (Al + Si) cations. There is considerable variation in substitution of Zn, Cu, Fe and V³⁺ for Ni and V⁵⁺ for S⁶⁺. Nickelalumite is monoclinic, P2₁/n, a = 10.2567(5), b = 8.8815(4), c = 17.0989(8) Å, β = 95.548(1)°, V = 1550.3(2) ų, Z = 4. The crystal structure of nickelalumite was refined to an R₁ index of 5.66% and consists of interrupted [NiAl₄(OH)₁₂] sheets intercalated with layers of {(SO₄)₂(H₂O)₃}; nickelalumite is a member of the chalcoalumite group.

镍铝矿，理想的情况是NiAl ₄ (SO ₄ )(OH) ₁₂ (H ₂ O) ₃，是吉尔吉斯斯坦巴特肯地区新批准的矿物，产于卡拉-唐吉和卡拉-查吉尔铀矿床。它形成于含紫外线的碳质硅质片岩的热液蚀变带中，与石英、方解石、铝水方解石、水铝英石、铁锰铝石、吉尔吉斯斯坦石、铁钙石和一种未知的 Al-OH-矿物有关。它以无色至开心果绿色辐射状叶片晶体的聚集体形式存在，长度为 0.05 至 0.50 毫米。呈玻璃状至透明薄片状，有白色条纹，在长波或短波紫外光下无荧光。解理完全平行于{001}并且没有观察到分离。莫氏硬度为2，性脆，呈片状断裂。计算出的质量密度为2.231 g cm ^–3。在透射平面偏振白光下，镍铝矿是非多色性、双轴的，α = 1.542(2)，γ = 1.533(2)，由于薄片的厚度几乎可以忽略不计，因此无法测量β。 EPMA化学分析给出Al ₂ O ₃ 39.94，SiO ₂ 0.17，SO ₃ 15.20，V ₂ O ₃ 0.29，FeO 0.15，NiO 8.00，ZnO 6.21，(H ₂ O)_计算值。 31.87，总量101.83 wt%，通过晶体结构分析测定H ₂ O，经验公式如下： (Ni _0.55 Zn _0.39 V _0.02 Fe _0.01 ) _Σ0.97 (Al _3.99 Si _0.01 ) _Σ4.00 (SO ₄ )(OH) ₁₂ (H ₂ O) ₃基于4个(Al + Si)阳离子。用Zn、Cu、Fe和V ³⁺代替Ni以及用V ⁵⁺代替S ⁶⁺存在相当大的变化。镍铝矿为单斜晶系，P 2 ₁ / n , a = 10.2567(5), b = 8.8815(4), c = 17.0989(8) Å, β = 95.548(1)°, V = 1550.3(2) Å ³ , Z = 4. 镍铝矿的晶体结构被细化至R ₁指数为 5.66%，由间断的 [NiAl ₄ (OH) ₁₂ ] 片层插入 {(SO ₄ ) ₂ (H ₂ O) _3层组成};镍铝矿是黄铜铝矿族的一员。