✦ LIBER ✦
Origin of the Mn2+ e.p.r. spectrum in Pittsburgh No. 8 bituminous coal
✍ Scribed by V.M. Malhotra; W.R.M. Graham
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 325 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0016-2361
No coin nor oath required. For personal study only.
✦ Synopsis
The e.p.r. and i.r. spectra of hand-picked samples of calcite from Pittsburgh No. 8 coal, show that it contains the Mn2+ paramagnetic ion and clay minerals as impurities. Furthermore, comparison of the e.p.r. spectra of hand-picked and natural calcite shows that the Mn2+ spectrum in this coal originates from calcite, which when diluted in KBr or coal produces a spectrum similar to that reported by other investigators. The results obtained when coal-derived calcite was treated with dilute H2S04 and HCI rules out the possibility that the Mn2+ originates from the pyrite or clays present in the coal.