MgS2O7
Magnesium disulfate is a stable, wide-gap insulating compound composed of magnesium, sulfur, and oxygen.
About MgS2O7
Magnesium disulfate is a distinct inorganic compound characterized by its insulating electronic nature. As a thermodynamically stable phase residing on the convex hull, it represents a robust configuration of magnesium, sulfur, and oxygen atoms.
This material is of interest for researchers studying complex sulfate systems where structural stability is paramount. Its wide-gap electronic character suggests potential utility in specialized dielectric applications or as a precursor in advanced chemical synthesis.
Key Properties
Cross-validated computational properties for MgS2O7, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Reported Structures
Lowest-energy structures reported for MgS2O7, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| P-1 (No. 2) | triclinic | 5.52 | 0.0000 | -6.599 | 2.49 |
| P-1 (No. 2) | — | — | — | — | — |
| P-1 (No. 2) | Triclinic | — | — | — | 2.38 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.54 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.42 |
Applications
Where MgS2O7 is used.
Frequently Asked Questions
Common questions about MgS2O7, answered from cross-validated data.
What is MgS2O7?
Magnesium disulfate is a stable, wide-gap insulating compound composed of magnesium, sulfur, and oxygen.
What is MgS2O7 used for?
What is the band gap of MgS2O7?
Is MgS2O7 a metal, semiconductor, or insulator?
Is MgS2O7 thermodynamically stable?
What is the crystal structure of MgS2O7?
What is the density of MgS2O7?
How many polymorphs of MgS2O7 are known?
What elements does MgS2O7 contain?
Where does the data for MgS2O7 come from?
How It Compares
As a thermodynamically stable compound, magnesium disulfate serves as a reliable reference point for structural studies within the broader family of magnesium-based sulfur-oxygen compounds, providing a benchmark for stability in this chemical space.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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