Pyroelectrically caused twisting of quartz crystals
The twisting of quartz crystals is conditioned by Dauphiné twinning. Each twisted crystal shows morphological characteristics confirming this type of quartz twinning.A linear mathematical correlation based on morphological parameters measured on quartz crystals elongated and twisted along their pola...
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| Format: | Article |
| Language: | English |
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Geological Survey of Slovenia
1994-12-01
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| Series: | Geologija |
| Subjects: | |
| Online Access: | http://www.geologija-revija.si/dokument.aspx?id=832 |
| _version_ | 1797945249296809984 |
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| author | Mirjan Žorž |
| author_facet | Mirjan Žorž |
| author_sort | Mirjan Žorž |
| collection | DOAJ |
| description | The twisting of quartz crystals is conditioned by Dauphiné twinning. Each twisted crystal shows morphological characteristics confirming this type of quartz twinning.A linear mathematical correlation based on morphological parameters measured on quartz crystals elongated and twisted along their polar [21.0] a-axis has been deduced. It was demonstrated that the twisting angle is the function of the twisting constant and some of the crystal dimensions. This constant has the same value cca 4° as the declination of the [21.0] edge of the crystal twisted around the[21.0] a-axis which also corresponds to the surface distribution of the positive charge observed with Dauphiné-twinned quartz crystal on cooling. A similar quartz feature is the twisting of a quartz crystal around the c-axis. A proposed theory describing the reasons for crystal twisting, development of different crystalforms and types of twisted quartz crystals is thus based on the pyroelectrically accelerated growth from slowly cooling and slightly supersaturated quartz-bearing solutions. |
| first_indexed | 2024-04-10T20:52:14Z |
| format | Article |
| id | doaj.art-46addfd5b10d41f9b0669fa829c2efb9 |
| institution | Directory Open Access Journal |
| issn | 0016-7789 1854-620X |
| language | English |
| last_indexed | 2024-04-10T20:52:14Z |
| publishDate | 1994-12-01 |
| publisher | Geological Survey of Slovenia |
| record_format | Article |
| series | Geologija |
| spelling | doaj.art-46addfd5b10d41f9b0669fa829c2efb92023-01-23T08:10:18ZengGeological Survey of SloveniaGeologija0016-77891854-620X1994-12-0136211222Pyroelectrically caused twisting of quartz crystalsMirjan ŽoržThe twisting of quartz crystals is conditioned by Dauphiné twinning. Each twisted crystal shows morphological characteristics confirming this type of quartz twinning.A linear mathematical correlation based on morphological parameters measured on quartz crystals elongated and twisted along their polar [21.0] a-axis has been deduced. It was demonstrated that the twisting angle is the function of the twisting constant and some of the crystal dimensions. This constant has the same value cca 4° as the declination of the [21.0] edge of the crystal twisted around the[21.0] a-axis which also corresponds to the surface distribution of the positive charge observed with Dauphiné-twinned quartz crystal on cooling. A similar quartz feature is the twisting of a quartz crystal around the c-axis. A proposed theory describing the reasons for crystal twisting, development of different crystalforms and types of twisted quartz crystals is thus based on the pyroelectrically accelerated growth from slowly cooling and slightly supersaturated quartz-bearing solutions.http://www.geologija-revija.si/dokument.aspx?id=832quartz crystal |
| spellingShingle | Mirjan Žorž Pyroelectrically caused twisting of quartz crystals Geologija quartz crystal |
| title | Pyroelectrically caused twisting of quartz crystals |
| title_full | Pyroelectrically caused twisting of quartz crystals |
| title_fullStr | Pyroelectrically caused twisting of quartz crystals |
| title_full_unstemmed | Pyroelectrically caused twisting of quartz crystals |
| title_short | Pyroelectrically caused twisting of quartz crystals |
| title_sort | pyroelectrically caused twisting of quartz crystals |
| topic | quartz crystal |
| url | http://www.geologija-revija.si/dokument.aspx?id=832 |
| work_keys_str_mv | AT mirjanzorz pyroelectricallycausedtwistingofquartzcrystals |