Description:
<jats:title>Abstract</jats:title><jats:p>The crystal structure of a natural specimen of Tetrawickmanite (Langban, Sweden) with the ideal composition of Mn<jats:sup>2+</jats:sup>Sn<jats:sup>4+</jats:sup>(OH)<jats:sub>6</jats:sub> (tetragonal space group P4<jats:sub>2</jats:sub>/n, Z = 4, single crystal XRD) belongs to the octahedral‐framework group of hydroxide‐perovskite minerals described by the general formula BB′(OH)<jats:sub>6</jats:sub>.</jats:p>