Magnesioleydetite and straβmannite, two new uranyl sulfate minerals with sheet structures from Red Canyon, Utah

Magnesioleydetite (IMA2017-063), Mg(UO 2 )(SO 4 ) 2 ·11H 2 O, and straβmannite (IMA2017-086), Al(UO 2 )(SO 4 ) 2 F·16H 2 O, are two new minerals from mines in Red Canyon, San Juan County, Utah, USA. Magnesioleydetite occurs in the Markey mine and straβmannite occurs in both the Markey and Green Lizard mines. Both minerals are secondary phases found in efflorescent crusts on the surfaces of mine walls. Magnesioleydetite occurs in irregular...