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wangchuke新蟲 (初入文壇)
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[求助]
MS建立周期性模型需不需要加氫飽和電荷 已有3人參與
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我想做表面吸附,用MS給原胞切面后建超胞,切面會(huì)不會(huì)使結(jié)構(gòu)帶有電荷?需不需要用氫來飽和呢?如果要的話,怎么確定加氫的個(gè)數(shù)和位置?求大神指教 發(fā)自小木蟲IOS客戶端 |
木蟲 (正式寫手)
新蟲 (初入文壇)
新蟲 (初入文壇)
金蟲 (正式寫手)

金蟲 (正式寫手)
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我想做表面吸附,用MS給原胞切面后建超胞,切面會(huì)不會(huì)使結(jié)構(gòu)帶有電荷?需不需要用氫來飽和呢?如果要的話,怎么確定加氫的個(gè)數(shù)和位置?求大神指 表面吸附模型,在建立表面模型的時(shí)候,可能因?yàn)樯舷卤砻娌粚?duì)稱有表面dipole存在。不然不會(huì)有電荷 下表面一般用H鈍化,來模擬bulk termination H的個(gè)數(shù),就看你下表面多少個(gè)懸掛鍵了。 H的位置,就是你懸掛鍵的位置 |

新蟲 (初入文壇)
送紅花一朵 |
Computational models. Anorthite, with the chemical composition of CaAl2Si2O8, is the calcium end-member of the plagioclase feldspars. A coupled substitution of two Al3+ for two of Si4+, allows the incorporation of one Ca2+ and overall neutrality53. The fully optimized cell parameters at P=90 bar, a= 8.231 ?, b= 12.98 ?, c= 14.15 ?, α= 93.9°, β= 115.4°, γ = 91.3°, are less than 1% different than the crystallographic parameters, a0= 8.1860 ?, b0= 12.876 ?, c0= 14.1820 ?, α= 93.3°, β= 115.8°,γ = 91.12°. Using the optimized parameters, an oxygen-terminated (001)surface model was generated,shown in Supplementary Fig. 1. A 2× 1× 1 slab model of the (001) surface (one of the most frequently occurring surfaces in this class of minerals23,54) with 18.3 ? interlayer space was created, including the top-most layer of Ca cations (Ca-rich surface) in order to study Ca-speciation and mobilization. The bottom side of the slab is devoid of Ca cations (Ca-deficient surface) in accordance with known cation vacancies as reported in the literature23. Finally, 8 hydrogens were added to terminal oxygens of the upper surface of the slab for charge compensation. 發(fā)自小木蟲IOS客戶端 |
新蟲 (初入文壇)
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