Table 1: Raman peaks attribution (cm-1) for Fe-Mn concretion fragments (Pacific Ocean bottom) between 100 and 1000 cm-1.
| Peak attribution | Fe-Mn fragments | ||||
|---|---|---|---|---|---|
| PAC1 | PAC2 | PAC4 | PAC6 | PAC8 | |
| QZ PL QZ PL QZ PL PH PL QZ PH PL PL SAN VER TOD VER TOD |
127 w 187 w 206 m 280 m 354 m 385 m 410 s 457 w 465 s 475 s 480 m 508 s 512 s 570 s 580 w 630 m 640 vs |
128 w 180 w 206 m 282 m 355 m 383 415 m 457 w 464 s 477 s 478 m 506 s 514 m - - 630 m - |
128 w 183 m 206 m 278 m 356 m - - - 464 vs - - 507 m - 570 s - - - |
128 w - 205 m - 356 m 385 m - 458 w 464 s - 482 w - - - 580 w - 635 vs |
128 w 151 m 205 m - 355 m - 410 m - 463 vs 476 s - - - 570 s - 630 m - |
TOD: Todorokite; VER: Vernadite; QZ: Quartz; PL: Plagioclase; SAN: Sanidine; PH: Phillipsite. Measurement accuracy in the spectra of crystalline polymorphs: 2 cm-1 for weak bands and 1 cm-1 for strong bands (Relative intensity of the bands: w: weak; m: medium; s: strong; vs: very strong).