Sodium magnesium sulfate is a double sulfate of sodium and magnesium. There are a number of different stoichiometries and degrees of hydration with different crystal structures, and many are minerals. Members include:
- Blödite or bloedite: sodium magnesium sulfate tetrahydrate Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub>â¢4H<sub>2</sub>O
- Disodium magnesium disulfate decahydrate Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub>â¢10H<sub>2</sub>O
- Disodium magnesium disulfate hexadecahydrate Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub>â¢16H<sub>2</sub>O
- Na<sub>2</sub>SÃÂ<sub>4</sub>÷MgSO<sub>4</sub>÷2.5H<sub>2</sub>O
- Konyaite Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub>â¢5H<sub>2</sub>O
- Löweite Na<sub>12</sub>Mg<sub>7</sub>(SO<sub>4</sub>)<sub>13</sub>â¢15H<sub>2</sub>O.
- Vanthoffite Na<sub>6</sub>Mg(SO<sub>4</sub>)<sub>4</sub>
- Na<sub>2</sub>Mg<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> langbeinite form stable from 569.2 to 624.7ðC
- Na<sub>2</sub>Mg<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> quenched monoclinic form
- Na<sub>2</sub>Mg<sub>3</sub>(SO<sub>4</sub>)<sub>4</sub> orthorhombic form
- Na<sub>2</sub>Mg(SO<sub>4</sub>)<sub>2</sub> triclinic form
Salts containing other anions in addition to sulfate
- Na<sub>2</sub>Mg<sub>3</sub>(OH)<sub>2</sub>(SO<sub>4</sub>)<sub>4</sub>â¢4H<sub>2</sub>O
- Tychite hexasodium dimagnesium sulfate tetracarbonate Na<sub>6</sub>Mg<sub>2</sub>SO<sub>4</sub>(CO<sub>3</sub>)<sub>4</sub>
- Uklonskovite NaMgSO<sub>4</sub>Fâ¢2H<sub>2</sub>O
References
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