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Fibrous nanoinclusions in massive rose quartz: The origin of rose coloration
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Julia S. Goreva
,
Chi Ma
Published/Copyright:
March 26, 2015
Abstract
Pink nanofibers were extracted from rose quartz from 29 different pegmatitic and massive vein localities throughout the world. Their width varied from 0.1 to 0.5 μm. On the basis of optical absorption spectra of the fibers and the initial rose quartz, we conclude that these nanofibrous inclusions are the cause of coloration of massive rose quartz worldwide. These fibers do not occur in the rare, euhedral variety of pink quartz. Redox and heating experiments showed that the pink color of the fibers is due to Fe-Ti intervalence charge transfer that produces an optical absorption band at 500 nm. Based on the XRD patterns and characteristics of pleochroism, the best match for these inclusions is dumortierite. However, FTIR and Raman spectra consistently did not exactly match the standard dumortierite patterns, suggesting that this fibrous nano-phase may not be dumortierite itself, but rather a closely related material.
Received: 2000-5-22
Accepted: 2000-12-7
Published Online: 2015-3-26
Published in Print: 2001-4-1
© 2015 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Some mineral physics constraints on the rheology and geothermal structure of Earth’s lower mantle
- Biodurability of talc
- Microbial biomineralization in weathered volcanic ash deposit and formation of biogenic minerals by experimental incubation
- In situ atomic force microscopy study of hectorite and nontronite dissolution: Implications for phyllosilicate edge surface structures and dissolution mechanisms
- Na- and Cs-exchange in a clinoptilolite-rich rock: Analysis of the outgoing cations in solution
- The effects of time, temperature, and concentration on Sr2+ exchange in clinoptilolite in aqueous solutions
- Thermodynamics of ion-exchanged and natural clinoptilolite
- Thermochemical study of calcium zeolites–heulandite and stilbite
- Fe3+/ΣFe vs. FeLα peak energy for minerals and glasses: Recent advances with the electron microprobe
- Fibrous nanoinclusions in massive rose quartz: The origin of rose coloration
- Cathodoluminescence study of apatite crystals
- Hydrogen in spessartine-almandine garnets as a tracer of granitic pegmatite evolution
- Ab initio studies of possible fluorine-bearing four- and fivefold coordinated Al species in aluminosilicate glasses
- The nature of radiohaloes in biotite: Experimental studies and modeling
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