Iron, carbonyl < 10 111 6.1 310 125 BZ 3 Eckhoff BuMines Manganese < 44 460 305 125 — — — RI 6516 16 157 6.3 330 Eckhoff — — — — 33 69 6.6 Eckhoff — — — — — Magnesium 28 508 17.5 Eckhoff — — — — Magnesium 240 12 7 760 500 BZ 5 Eckhoff BuMines Magnesium <44 620 40 40 — — — RI 6516 <3 ( BuMines Magnesium <44 — 600 240 30 — C) RI 6516 Cashdollar Magnesium ~16 7.5 55 & — — — — — Zlochower Not Molybdenum <10 Eckhoff Not Cashdollar Nickel ~6 & Zlochower Niobium 80 238 6.3 560 3 70 6 (Ar) Industry Niobium 70 326 7.1 591 3 50 5 (Ar) Industry Silicon <10 126 10.2 >850 54 125 BZ 3 Eckhoff Silicon, from dust 16 100 9.4 800 60 Eckhoff — — collector Silicon, from filter <10 116 9.5 >850 250 60 BZ 1 Eckhoff BuMines Tantalum <44 630 120 <200 3 (Ar) — — RI 6516 Cashdollar Tantalum ~10 & ≈3 ≈400 Zlochower Tantalum 100 149 6.0 460 <3 160 2 (Ar) Industry Tantalum 80 97 3.7 540 <3 160 2(Ar) Industry Tantalum 50 108 5.5 520 <3 160 2(Ar) Industry Tantalum 65 129 5.8 460 <3 160 2(Ar) Industry
Iron, carbonyl < 10 111 6.1 310 125 BZ 3 Eckhoff Manganese < 44 — — 460 305 125 — BuMines RI 6516 16 157 6.3 330 — — — — Eckhoff 33 69 6.6 — — — — — Eckhoff Magnesium 28 508 17.5 — — — — Eckhoff Magnesium 240 12 7 760 500 BZ 5 Eckhoff Magnesium <44 — — 620 40 40 — BuMines RI 6516 Magnesium <44 — 600 240 30 — <3 ( C) BuMines RI 6516 Magnesium ~16 — 7.5 — — 55 — — Cashdollar & Zlochower Molybdenum <10 Not Eckhoff Nickel ~6 Not Cashdollar & Zlochower Niobium 80 238 6.3 560 3 70 6 (Ar) Industry Niobium 70 326 7.1 591 3 50 5 (Ar) Industry Silicon <10 126 10.2 >850 54 125 BZ 3 Eckhoff Silicon, from dust collector 16 100 9.4 800 — 60 — Eckhoff Silicon, from filter <10 116 9.5 >850 250 60 BZ 1 Eckhoff Tantalum <44 — — 630 120 <200 3 (Ar) BuMines RI 6516 Tantalum ~10 ≈3 ≈400 Cashdollar & Zlochower Tantalum 100 149 6.0 460 <3 160 2 (Ar) Industry Tantalum 80 97 3.7 540 <3 160 2(Ar) Industry Tantalum 50 108 5.5 520 <3 160 2(Ar) Industry Tantalum 65 129 5.8 460 <3 160 2(Ar) Industry