TEM study of Franklinite-hetaerolite (ZnFe{sub 2}O{sub 4}-ZnMn{sub 2}O{sub 4}) exsolution intergrowths
- Univ. of New Mexico, Albuquerque, NM (United States)
The spinel structure-type is derived from ccp oxygen packing by cation occupation of one quarter of the tetrahedral and one half of the octahedral interstices with a general stoichiometry of AB{sub 2}O{sub 4}. Franklinite, ideally ZnFe{sub 2}O{sub 4}, was the dominant ore mineral of zinc at the great Franklin and Sterling Hill zinc deposits, New Jersey. Although the chemistry of franklinite conformed to the spinel formula, the composition showed a wide range in the porportions of iron, zinc, and manganese. The microscopic examination of polished sections of the Franklin spinel revealed oriented exsolution intergrowths of franklinite, magnetite (Fe{sup 2+}Fe{sup 3+}{sub 2}O{sub 4}), and gahnite (ideally ZnAl{sub 2}O{sub 4}). In this contribution, the exsolution intergrowths of franklinite and hetaerolite (ideally ZnMn{sub 2}O{sub 4}) are well characterized using JEM 2000FX and JEM 2010 electron microscopes operated at 200 keV.
- DOE Contract Number:
- FG03-93ER45498
- OSTI ID:
- 468889
- Report Number(s):
- CONF-960877--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Surface characterization of ZnO/ZnMn{sub 2}O{sub 4} and Cu/Mn{sub 3}O{sub 4} powders obtained by thermal degradation of heterobimetallic complexes
Operando identification of the point of [Mn-2]O-4 spinel formation during gamma-MnO2 discharge within batteries