Sodium metatungstate: a new heavy-mineral separation medium for the extraction of conodonts from insoluble residues
| Autor: | Stanley T. Krukowski |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
0106 biological sciences
010506 paleontology Mineral business.industry Heavy mineral Chemistry Extraction (chemistry) Sodium metatungstate Paleontology Mineralogy Feldspar 010603 evolutionary biology 01 natural sciences chemistry.chemical_compound visual_art visual_art.visual_art_medium Sodium polytungstate Coal business 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Journal of Paleontology. 62:314-316 |
| ISSN: | 1937-2337 0022-3360 |
| DOI: | 10.1017/s0022336000030018 |
| Popis: | Sodium metatungstate (SMT), 3Na2WO4 · 9WO3 · H2O, is a nontoxic (Sax, 1979), high-density (1.00-3.10 g/cm3) separating compound which results in nearly neutral (pH 6) solutions of relatively low viscosity. It was presented as a medium for density gradient centrifugation by Plewinsky and Kamp (1984). Since then, investigators have used SMT (or sodium polytungstate) as a high-density medium for routine mineral separations, for recovery of conodonts from insoluble residues, for separation of various feldspar species from one another, and for segregation of inorganic mineral fractions (ash) from coal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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