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ERIC Number: EJ820315
Record Type: Journal
Publication Date: 2006-Nov
Pages: 3
Abstractor: As Provided
Reference Count: 21
ISBN: N/A
ISSN: ISSN-0021-9584
Synthesis and Characterization of a Layered Manganese Oxide: Materials Chemistry for the Inorganic or Instrumental Methods Lab
Ching, Stanton; Neupane, Ram P.; Gray, Timothy P.
Journal of Chemical Education, v83 n11 p1674-1676 Nov 2006
A three-week laboratory project involving synthesis and characterization of a layered manganese oxide provides an excellent vehicle for teaching important concepts of inorganic chemistry and instrumental methods related to non-molecular systems. Na-birnessite is an easily prepared manganese oxide with a 7 A interlayer spacing and Na[superscript +] cations and water in the interstitial region. The material is readily characterized by powder X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, elemental analysis, and Mn oxidation state determination. It also undergoes facile ion exchange with Mg[superscript 2+] to yield Mg-buserite, an analogous manganese oxide with a 9.6 A interlayer spacing. Diffraction patterns and physical morphology can be related to the layered structure of the material. A thorough compositional analysis can also be done, which includes determination of mixed valency and interstitial hydration. (Contains 4 figures.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail: jchemed@egpp.com; Web site: http://www.jce.divched.org
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A