{{Infobox mineral
| name = 软钾镁矾
| image = Halite-Picromerite-mrz114a.jpg
| alt =
| caption = 石盐上的软钾镁矾
| category = 硫酸盐矿物
| formula = K2Mg(SO4)2·6H2O
| strunz = 7.CC.60
| dana = 29.03.06.01
| system = 单斜晶系
| class = 棱柱体(2/m)
(相同赫尔曼–莫甘记号)
| symmetry = P21/a
| unit cell = a = 9.07, b = 12.21,
c = 6.11 [Å]; β = 104,8°; Z = 2
| color = 无色；白、灰、淡红、淡黄
| habit = 块状集合体、皮壳状、棱柱晶体
| twinning =
| cleavage = 完美{01}
}}
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