| 单词 | widmanstätten figures |
| 释义 | Widmanstätten figuresWidmanstätten figures:see meteoritemeteorite,meteor that survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become meteorites. ..... Click the link for more information. . Widmanstätten figures(vid -măn-shtet-ĕn) Patterns of nickel-rich and nickel-poor bands crossing one another in two, three, or four directions that are revealed when polished surfaces of most iron meteorites are etched. They are lamellar intergrowths of kamacite, taenite, and plessite. |
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