Ca2NiWO6
Ca2NiWO6 has a DFT band gap of 2.89–3.18 eV across 12 reported structures in 3 space groups; its reference structure is monoclinic (P21/c (No. 14)). Cross-validated across 2 computational databases.
CaNiOW
At a glance
Key Properties
Cross-validated computational properties for Ca2NiWO6, aggregated across 2 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.
2.89–3.18 eV
Range across DFT structures · ground state: wide gap
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.
0.002 eV/atom
Best (lowest) across sources
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.
Stable
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
12
2 databases, 3 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Ca2NiWO6. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
0.99 / 1.00
Trust tier: medium
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
0.002 eV
EAH spread across sources
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
2
materials_project, oqmd
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
—
Crystallography
Reported Structures
Lowest-energy structures reported for Ca2NiWO6, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 2.93 | 0.0000 | -7.852 | 5.80 |
| — | — | 3.14 | 0.0019 | -2.665 | — |
| — | — | 2.89 | 0.0996 | -2.567 | — |
| Pnnm (No. 58) | orthorhombic | 3.13 | 0.1017 | -7.750 | 4.82 |
| C2 (No. 5) | monoclinic | 0.60 | 0.1065 | -7.745 | 5.63 |
| — | — | 3.18 | 0.1133 | -2.553 | — |
| P21/c (No. 14) | monoclinic | — | — | — | 6.04 |
| C2 (No. 5) | monoclinic | — | — | — | 5.80 |
| Pnnm (No. 58) | orthorhombic | — | — | — | 4.96 |
| C2 (No. 5) | monoclinic | — | — | — | 5.63 |
| P21/c (No. 14) | monoclinic | — | — | — | 6.00 |
| C2 (No. 5) | monoclinic | — | — | — | 6.04 |
Synthesis
Synthesis Routes
Literature-extracted synthesis procedures targeting Ca2NiWO6.
Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Reference
Frequently Asked Questions
Common questions about Ca2NiWO6, answered from cross-validated data.
What is the band gap of Ca2NiWO6?
Ca2NiWO6 has a DFT-computed band gap of 2.89–3.18 eV across 12 reported structures. Standard DFT underestimates band gaps, so the measured gap is typically larger.
More questions
Is Ca2NiWO6 a metal, semiconductor, or insulator?
DFT predicts a wide band gap of up to 3.18 eV (an insulator or wide-band-gap material).
Is Ca2NiWO6 thermodynamically stable?
Ca2NiWO6 has a lowest energy above hull of 0.002 eV/atom (stable).
What is the crystal structure of Ca2NiWO6?
The reference structure of Ca2NiWO6 is monoclinic symmetry, space group P21/c (No. 14).
What is the density of Ca2NiWO6?
The computed density of the ground-state structure of Ca2NiWO6 is 5.80 g/cm³.
How many polymorphs of Ca2NiWO6 are known?
12 structures of Ca2NiWO6 are reported across 2 databases, spanning 3 distinct space groups.
How is Ca2NiWO6 synthesized?
Literature-reported routes for Ca2NiWO6 include solid state (2 procedures documented).
What elements does Ca2NiWO6 contain?
Ca2NiWO6 contains Ca, Ni, O, and W (4 elements).
Where does the data for Ca2NiWO6 come from?
Ca2NiWO6 data is cross-referenced from materials_project, oqmd, cod, mpaloe.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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