| 词条 | Tenacity (mineralogy) |
| 释义 |
In mineralogy, tenacity is a mineral's behavior when deformed or broken. Common terms[1]Brittleness:The mineral breaks or powders easily. Most ionic-bonded minerals are brittle. Malleability:The mineral may be pounded out into thin sheets. Metallic-bonded minerals are usually malleable. Ductility:The mineral may be drawn into a wire. Ductile materials have to be malleable as well as tough. Sectility:May be cut smoothly with a knife. Relatively few minerals are sectile. Sectility is a form of tenacity and can be used to distinguish minerals of similar appearance.[2] Gold, for example, is sectile but pyrite ("fool's gold") is not. Elasticity:If bent, will spring back to its original position when the stress is released. Plasticity:If bent, will not spring back to its original position when the stress is released. It stays bent. In contrast, flexibility is the ability of a material to deform elastically and return to its original shape when the applied stress is removed. References1. ^Nesse, William D. "Physical Properties of Minerals." Introduction to Mineralogy. New York: Oxford UP, 2000. 122. Print. {{Geology-stub}}2. ^{{cite web|url=http://www.minerals.net/mineral_glossary/sectile.aspx|title=Sectile - Minerals.net Glossary of Terms|author=|date=|website=www.minerals.net|accessdate=10 April 2018}} 3 : Mineralogy|Deformation (mechanics)|Materials science |
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