'Orthoclase,Carlsbad twins'
Bildnummer 12000212
| Orthoclase,potassium aluminum silicate,is a member of the large family of feldspars,and has been called the most common of all silicate minerals. It is a component of a huge variety of igneous and metamorphic rocks,and occurs all over the world. It is a primary constituent of granite and granite pegmatite,the latter being a host to many gem materials. Orthoclase displays monoclinic symmetry,as opposed to another related potassium feldspar,microcline,that has triclinic symmetry. Orthoclase is common as crystals,and these are usually twinned,i.e. intergrown along a specific symmetry axis or plane. Carlsbad twins are distinctive and useful in identification of the mineral | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Arem, Joel |
| Bildgröße: | 3855 px × 2553 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: |
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