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Material/Specimen
- Tantalum boride14
- Tantalum nitride14
- Tungsten carbide14
- Barium tungstate11
- Cobalt tungstate9
- Copper tungstate9
- Nickel tungstate9
- Silver(I) tungstate9
- Zinc tungstate9
- Lead zirconate8
- Zinc antimonide8
- Erbium chloride Hydrous7
- Erbium fluoride Anhydrous7
- Erbium hydride7
- Erbium nitrate Hydrous7
- Erbium oxalate Hydrous7
- Erbium oxide7
- Erbium sulfide7
- Iron tungstate7
- Lead(II) titanate7