| 24小時(shí)熱門(mén)版塊排行榜 |
| 6 | 1/1 | 返回列表 |
| 查看: 1913 | 回復(fù): 5 | ||
horson金蟲(chóng) (小有名氣)
|
[求助]
VASP識(shí)別對(duì)稱性的能力如何?
|
|
據(jù)說(shuō)VASP對(duì)晶體的對(duì)稱性識(shí)別能力不好,并且只能粗略地識(shí)別點(diǎn)群而非空間群,不知是否如此? 我編輯了一個(gè)方解石的POSCAR文件,從OUTCAR文件來(lái)看VASP連點(diǎn)群都沒(méi)有識(shí)別對(duì)。不知是不是我的理解有問(wèn)題,請(qǐng)大伙幫我看看: POSCAR文件(附件中有源文件): Ca C O (Hexagonal Calcite) 1.0 4.3211203770054700 -2.4948000771893200 0.0000000000000000 0.0000000000000000 4.9896000000000000 0.0000000000000000 0.0000000000000000 0.0000000000000000 17.0610000000000000 6 6 18 Direct 0 0 0 0.6667 0.3333 0.3333 0.3333 0.6667 0.6667 0 0 0.5 0.6667 0.3333 0.8333 0.3333 0.6667 0.1667 0 0 0.25 0.6667 0.3333 0.5833 0.3333 0.6667 0.9167 0 0 0.75 0.6667 0.3333 0.0833 0.3333 0.6667 0.4167 0.2768 0 0.25 0 0.2768 0.25 0.7232 0.7232 0.25 0.6667 0.6101 0.5833 0.0565 0.3898 0.9167 0.3899 0.0565 0.5833 0.6101 0.6667 0.9167 0.9435 0.3333 0.5833 0.3333 0.9435 0.9167 0.2768 0.2768 0.75 0 0.7232 0.75 0.7232 0 0.75 0.6667 0.0565 0.0833 0.0565 0.6667 0.4167 0.3899 0.3333 0.0833 0.6101 0.9435 0.4167 0.9435 0.6101 0.0833 0.3333 0.3899 0.4167 OUTCAR的相關(guān)輸出: LATTYP: Found a hexagonal cell. ALAT = 4.9895999807 C/A-ratio = 3.4193121825 Lattice vectors: A1 = ( 4.3211203770, -2.4948000772, 0.0000000000) A2 = ( 0.0000000000, 4.9896000000, 0.0000000000) A3 = ( 0.0000000000, 0.0000000000, 17.0610000000) Subroutine PRICEL returns: Original cell was already a primitive cell. Analysis of symmetry for initial positions (statically): Routine SETGRP: Setting up the symmetry group for a hexagonal supercell. Subroutine GETGRP returns: Found 1 space group operations (whereof 1 operations were pure point group operations) out of a pool of 24 trial point group operations. The static configuration has the point symmetry C_1 . Analysis of symmetry for dynamics (positions and initial velocities): Subroutine DYNSYM returns: Found 1 space group operations (whereof 1 operations were pure point group operations) out of a pool of 1 trial space group operations (whereof 1 operations were pure point group operations) and found also 1 'primitive' translations The dynamic configuration has the point symmetry C_1 . |
榮譽(yù)版主 (著名寫(xiě)手)
|
"VASP includes a full featured symmetry code which determines the symmetry of arbitrary configurations automatically." 應(yīng)該來(lái)說(shuō),其識(shí)別能力還是很強(qiáng)的。 問(wèn)題在0.3333和0.6667上,至少精確到6位。如0.333333、0.666667這樣才能識(shí)別出1/3和2/3。 VASP中實(shí)際上是由SYMPREC這個(gè)參數(shù)來(lái)控制的,默認(rèn)值10^−5。建議閱讀手冊(cè)“6.27 ISYM-tag and SYMPREC-tag” |
金蟲(chóng) (小有名氣)
送鮮花一朵 |
謝謝!POSCAR文件修改為如下,仍然識(shí)別為C_1,不知為何? Ca C O (Hexagonal Calcite) 1.0 4.3211203770054700 -2.4948000771893200 0.0000000000000000 0.0000000000000000 4.9896000000000000 0.0000000000000000 0.0000000000000000 0.0000000000000000 17.0610000000000000 6 6 18 Direct 0 0 0 0.666667 0.333333 0.333333 0.333333 0.666667 0.666667 0 0 0.5 0.666667 0.333333 0.833333 0.333333 0.666667 0.166667 0 0 0.25 0.666667 0.333333 0.583333 0.333333 0.666667 0.916667 0 0 0.75 0.666667 0.333333 0.083333 0.333333 0.666667 0.416667 0.2768 0 0.25 0 0.2768 0.25 0.7232 0.7232 0.25 0.666667 0.6101 0.583333 0.0565 0.3898 0.916667 0.3899 0.0565 0.583333 0.6101 0.666667 0.916667 0.9435 0.333333 0.583333 0.333333 0.9435 0.916667 0.2768 0.2768 0.75 0 0.7232 0.75 0.7232 0 0.75 0.666667 0.0565 0.083333 0.0565 0.666667 0.416667 0.3899 0.333333 0.083333 0.6101 0.9435 0.416667 0.9435 0.6101 0.083333 0.333333 0.3899 0.416667 |
禁蟲(chóng) (正式寫(xiě)手)
隱清堂主
金蟲(chóng) (小有名氣)
鐵蟲(chóng) (初入文壇)

| 6 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 288求調(diào)劑,一志愿華南理工大學(xué)071005 +5 | ioodiiij 2026-03-17 | 5/250 |
|
|---|---|---|---|---|
|
[考研] 一志愿北京化工大學(xué)0703化學(xué)318分,有科研經(jīng)歷,求調(diào)劑 +3 | 一瓶苯甲酸 2026-03-14 | 3/150 |
|
|
[考研] 287求調(diào)劑 +3 | 晨昏線與星海 2026-03-19 | 4/200 |
|
|
[考研] 一志愿中海洋材料工程專(zhuān)碩330分求調(diào)劑 +7 | 小材化本科 2026-03-18 | 7/350 |
|
|
[考研] 一志愿武理材料305分求調(diào)劑 +5 | 想上岸的鯉魚(yú) 2026-03-18 | 6/300 |
|
|
[考研] 085600材料與化工 +5 | 安全上岸! 2026-03-16 | 5/250 |
|
|
[考研] 311求調(diào)劑 +6 | 26研0 2026-03-15 | 6/300 |
|
|
[考研] 0854可跨調(diào)劑,一作一項(xiàng)核心論文五項(xiàng)專(zhuān)利,省、國(guó)級(jí)證書(shū)40+數(shù)一英一287 +8 | 小李0854 2026-03-16 | 8/400 |
|
|
[考研] 299求調(diào)劑 +5 | △小透明* 2026-03-17 | 5/250 |
|
|
[考研] 280求調(diào)劑 +6 | 咕嚕曉曉 2026-03-18 | 7/350 |
|
|
[考研] 0703化學(xué)336分求調(diào)劑 +6 | zbzihdhd 2026-03-15 | 7/350 |
|
|
[考研] 環(huán)境工程調(diào)劑 +8 | 大可digkids 2026-03-16 | 8/400 |
|
|
[考研] 考研求調(diào)劑 +3 | 橘頌. 2026-03-17 | 4/200 |
|
|
[考研] 考研化學(xué)學(xué)碩調(diào)劑,一志愿985 +4 | 張vvvv 2026-03-15 | 6/300 |
|
|
[考研] 材料專(zhuān)碩326求調(diào)劑 +6 | 墨煜姒莘 2026-03-15 | 7/350 |
|
|
[考研] 290求調(diào)劑 +3 | p asserby. 2026-03-15 | 4/200 |
|
|
[考研] 321求調(diào)劑 +5 | 大米飯! 2026-03-15 | 5/250 |
|
|
[考研] 求老師收留調(diào)劑 +4 | jiang姜66 2026-03-14 | 5/250 |
|
|
[考研] 070305求調(diào)劑 +3 | mlpqaz03 2026-03-14 | 4/200 |
|
|
[考研] 復(fù)試調(diào)劑 +3 | 呼呼?~+123456 2026-03-14 | 3/150 |
|