Synthesis of the first nickel borate nitrate K₇Ni[B₁₈O₂₄(OH)₉](NO₃)₆· (H₃BO₃)
2019
Zöller, Michael | Wurst, Klaus | Huppertz, Hubert
The novel potassium nickel borate nitrate K₇Ni[B₁₈O₂₄(OH)₉](NO₃)₆ ·(H₃BO₃) was obtained from a simple hydrothermal synthesis in a stainless-steel autoclave at T = 513 K starting with nickel dichloride hexahydrate, and boric and nitric acid with the pH adjusted to 8 by KOH. Single-crystal X-ray diffraction data provided the basis for the structure analysis and refinement. The compound crystallizes in the trigonal space group R3̅ (no. 148) with the lattice parameters a = 1222.29(8) and c = 5478.4(4) pm. Generally, K₇Ni[B₁₈O₂₄(OH)₉](NO₃)₆ ·(H₃BO₃) is comprised of nitrate layers and complex nickel borate layers surrounded by boric acid, nitrate anions, and potassium cations.
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