| Answer | Crossword Clue |
|---|---|
| PURE | Not alloyed |
| unalloyed | not alloyed |
| PUREST | Least alloyed |
| osmium | a very hard brittle bluish-white metal occurring with platinum and alloyed with iridium in osmiridium: used to produce platinum alloys, mainly for pen tips and instrument pivots, as a catalyst, and in electric-light filaments. Symbol: Os; atomic no: 76; atomic wt: 190.2; valency: 0 to 8; relative density: 22.57; melting pt: 3033±30°C; boiling pt: 5012±100°C |
