为什么紫水晶的颜色如果接触到太多的光褪色吗?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 10 - t12:24:44z //www.hoelymoley.com/feeds/question/345 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/345 17 为什么紫水晶的颜色如果接触到太多的光褪色吗? Kenshin //www.hoelymoley.com/users/51 2014 - 04 - 19 - t02:05:32z 2019 - 04 - 27 - t09:35:17z < p >众所周知,紫水晶的紫色色调,特点是石英($ \ ce{二氧化硅}$)将消失,如果晶体是长时间的曝光时间。这种变化的内在机制是什么? < / p > //www.hoelymoley.com/questions/345/-/430 # 430 4 答案由马克Rovetta为什么紫水晶的颜色如果接触到太多的光褪色吗? 马克Rovetta //www.hoelymoley.com/users/178 2014 - 04 - 22 - t17:12:21z 2014 - 12 - 19 - t10:02:13z < p >一种矿物的颜色可以由多种机制引起的。紫水晶也是如此,这是一个各种各样的石英($ \ ce{二氧化硅}$),可以发现在许多颜色。< / p > < p >的主要因素负责< a href = " http://www.enmu.edu/services/museums/miles-mineral/colors.shtml " rel =“nofollow”> < / >生产颜色的矿物分为五类:< / p > < ol > <李>元素的存在必不可少的矿物成分李< / > <李>存在轻微的化学杂质李< / > <李>生理缺陷的晶体结构李< / > <李>机械混合物颗粒非常细的杂质李< / > < >李间隔结构矿物的存在< /李> < / ol > < p >看到这些页面了解更多的关于< a href = " http://minerals.gps.caltech.edu/COLOR_Causes/index.html " rel =“nofollow”>导致矿物的颜色< / >。< / p > < p >如果你搜索“石英颜色中心”,你会发现一个大型文学在这个问题上。一些颜色中心石英晶体可以被创建或被辐射光或x射线。< / p > < p >的定量测量和研究矿物颜色叫做< a href = " http://minerals.gps.caltech.edu/ " rel =“nofollow”>矿物光谱< / >。< / p > //www.hoelymoley.com/questions/345/-/3126 # 3126 7 由user889回答为什么紫水晶的颜色如果接触到太多的光褪色吗? user889 //www.hoelymoley.com/users/0 2014 - 12 - 23 - t22:24:12z 2014 - 12 - 23 - t22:24:12z < p >紫水晶的原因失去了颜色在阳光下在很大程度上是由于杂质什么\ ce{二氧化硅}美元晶体结构给出了生动的紫色和紫色的紫晶。< / p >

According to several sources (1),(2),(3), the main source of the colour is naturally irradation-borne tetravalent iron $\ce{Fe^{4+}}$, which is formed via naturally occurring gamma radiation altering trivalent iron $\ce{Fe^{3+}}$ during crystalisation (3). Other elements exist as impurities but are far less important considerations for the colour produced (3).

The tetravalent state of iron is inherently unstable in 'normal' surface conditions and the process is reversible due to prolonged exposure to natural sunlight (3). Some research and experiments have demonstrated that some of the bleaching is caused by the UV portion of sunlight (4).

References

(1) Amethyst, Mindat.org

(2) Dudushenko et al. 2003, What Oxidation State of Iron Determines the Amethyst Colour?, ICAME 2003

(3) Hatipoğlu et al. 2011, Spectral, electron microscopic and chemical investigations of gamma-induced purple color zonings in amethyst crystals from the Dursunbey-Balıkesir region of Turkey, Radiation Effects and Defects in Solids: Incorporating Plasma Science and Plasma Technology

(4) Nunes et al. 2013, Spectroscopic study of natural quartz samples, Radiation Physics and Chemistry

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