藍絲黛爾石:修订间差异
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== 存在 == |
== 存在 == |
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藍絲黛爾石 |
藍絲黛爾石存在于隕石的金剛石上,是一個連結在金剛石上非肉眼可見的顯微晶體。除魔谷隕石外,在美國[[新墨西哥州]]的「肯納隕石」(Kenna meteorite)、[[南極洲]][[維多利亞地]]的[[艾倫丘陵隕石]]77283(Allan Hills (ALH) 77283)上亦有發現。<ref> |
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{{cite journal |
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|authors=Kaminskii, F.V.; G.K. Blinova; E.M. Galimov; G.A. Gurkina; Y.A. Klyuev; L.A. Kodina; V.I. Koptil; V.F. Krivonos; L.N. Frolova; A.Y. Khrenov |
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|date=1985 |
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|title=Polycrystalline aggregates of diamond with lonsdaleite from Yakutian [Sakhan] placers |
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|journal=Mineral. Zhurnal |
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|volume=7 |pages=27–36 |
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}} |
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</ref>有争议的[[克洛维斯彗星假说]]支持者发现,在墨西哥[[瓜纳华托州]][[奎采奥湖]]的沉积物中发现了具有d间距与蓝丝黛尔石一致的材料。<ref> |
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{{cite journal |
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|last1=Israde-Alcantara |first1=I. |
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|last2=Bischoff |first2=J.L. |
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|last3=Dominguez-Vazquez |first3=G. |
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|last4=Li |first4=H.-C. |last5=Decarli |first5=P.S. |
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|last6=Bunch |first6=T.E. |last7=Wittke |first7=J.H. |
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|last8=Weaver |first8=J.C. |last9=Firestone |first9=R.B. |
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|last10=West |first10=A. |last11=Kennett |first11=J.P. |
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|last12=Mercer |first12=C. |last13=Xie |first13=S. |
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|last14=Richman |first14=E.K. |last15=Kinzie |first15=C.R. |
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|last16=Wolbach |first16=W.S. |display-authors=6 |
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|year=2012 |
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|title=Evidence from central Mexico supporting the Younger Dryas extraterrestrial impact hypothesis |
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|journal=Proceedings of the National Academy of Sciences |
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|volume=109 |issue=13 |pages=E:738–747 |
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|pmid=22392980 |doi=10.1073/pnas.1110614109 |
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|bibcode=2012PNAS..109E.738I |pmc=3324006 |
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|doi-access=free |
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}} |
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</ref>此外,蓝丝黛尔石存在于当地的泥炭沉积物中,被认为是[[通古斯大爆炸]]是由流星而非彗星碎片引起的证据。<ref> |
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{{cite journal |
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|last1=Kvasnytsya |first1=Victor |
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|last2=Wirth |last3=Dobrzhinetskaya |last4=Matzel |
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|last5=Jacobsend |last6=Hutcheon |last7=Tappero |
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|last8=Kovalyukh |
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|date=August 2013 |
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|title=New evidence of meteoritic origin of the Tunguska cosmic body |
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|journal=Planetary and Space Science |
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|volume=84 |pages=131–140 |
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|doi=10.1016/j.pss.2013.05.003 |bibcode=2013P&SS...84..131K |
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|url=http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:247242 |
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}} |
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</ref><ref> |
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{{cite web |
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|last=Redfern |first=Simon |
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|title=Russian meteor shockwave circled globe twice |
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|website=BBC News |
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|publisher=[[British Broadcasting Corporation]] |
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|url=https://www.bbc.co.uk/news/science-environment-23066055 |
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|access-date=28 June 2013 |
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}} |
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</ref> |
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==合成== |
==合成== |
2021年12月19日 (日) 11:57的版本
此條目需要擴充。 (2013年2月12日) |
藍絲黛爾石 Lonsdaleite | |
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藍絲黛爾石的晶体结构 | |
基本資料 | |
類別 | 礦物 |
化学式 | C |
施特龙茨分类 | 01.CB.10b |
晶体分类 | 雙六方二錐 (6/mmm) 赫尔曼–莫甘记号: (6/m 2/m 2/m) |
晶体空间群 | P63/mmc |
晶胞 | a = 2.51 Å, c = 4.12 Å; Z=4 |
性質 | |
顏色 | 晶体为灰色,断片为苍黄色至棕色 |
晶系 | 六方晶系 |
莫氏硬度 | 7-8 |
光澤 | 金刚光泽 |
透明性 | 透明 |
比重 | 3.2 |
光學性質 | 单轴(+/-) |
折射率 | n = 2.404 |
參考文獻 | [1][2][3] |
藍絲黛爾石(Lonsdaleite)也译做郎士德碳,又因晶體結構及特性稱作六方金剛石(hexagonal diamond)、六方碳。藍絲黛爾石是一種六方晶系的金剛石,屬於碳同素異形體的一種構形,咸信為流星上的石墨在墜入地球時所形成。撞擊時的巨大壓力及熱量改變石墨構形形成金剛石,卻又保留了石墨的平行六邊形晶格,並構成了立方的六方晶格。第一次鑑別出藍絲黛爾石是1967年在美國亞利桑那州的巴林杰隕石坑[4],從位在其中的「魔谷隕石」中所發現,並以20世紀的愛爾蘭晶體學家和英國皇家學會凱瑟琳·朗斯代爾(Kathleen Lonsdale)命名,因她使用X射線研究了碳的結構。
藍絲黛爾石具有透明棕黃色的外觀,折射率在2.40至2.41之間,比重在3.2至3.3之間。它的莫氏硬度在7至8之間,而金剛石的莫氏硬度則為10。藍絲黛爾石較低的硬度主要原因是因为天然形成礦石不純且不完美所致。但如果以人工合成則比鑽石硬58%,而抗壓程度也比鑽石高了大約58%。[5]
藍絲黛爾石也已經在實驗室中(1966年或更早; 1967年出版[6])被合成,方法是在靜態壓力機或炸藥中壓縮和加熱石墨[7]。
存在
藍絲黛爾石存在于隕石的金剛石上,是一個連結在金剛石上非肉眼可見的顯微晶體。除魔谷隕石外,在美國新墨西哥州的「肯納隕石」(Kenna meteorite)、南極洲維多利亞地的艾倫丘陵隕石77283(Allan Hills (ALH) 77283)上亦有發現。[8]有争议的克洛维斯彗星假说支持者发现,在墨西哥瓜纳华托州奎采奥湖的沉积物中发现了具有d间距与蓝丝黛尔石一致的材料。[9]此外,蓝丝黛尔石存在于当地的泥炭沉积物中,被认为是通古斯大爆炸是由流星而非彗星碎片引起的证据。[10][11]
合成
除了通过加压或使用炸药压缩和加热石墨,[12][13]蓝丝黛尔石也可以通过化学气相沉积[14][15][16]或是聚合物聚甲炔在1,000 °C(1,832 °F)的氩气气氛下热分解而成。[17][18]
2020年,澳大利亚国立大学的研究人员偶然发现使用金刚石压砧就可以在室温下生产蓝丝黛尔石。[19][20]
2021年,华盛顿州立大学的冲击物理研究所发表了一篇论文,称他们创造了足够大的蓝丝黛尔石晶体来测量其硬度,证实它们比普通的立方钻石更坚硬。[21]
参见
参考
- ^ Lonsdaleite on Mindat.org. [2005-09-10]. (原始内容存档于2021-03-31).
- ^ Handbook of Mineralogy (PDF). [2013-02-11]. (原始内容存档 (PDF)于2012-03-30).
- ^ Lonsdaleite data from Webmineral. [2005-09-10]. (原始内容存档于2021-03-31).
- ^ 存档副本. [2005-09-10]. (原始内容存档于2006-10-11).
- ^ Carlomagno, G.M.; Brebbia, C.A. Computational Methods and Experimental Measurements XV. WIT Press. 2011. ISBN 978-1-84564-540-3.
- ^ Bundy, F. P.; Kasper, J. S. Hexagonal Diamond—A New Form of Carbon. Journal of Chemical Physics. 1967, 46 (9): 3437. Bibcode:1967JChPh..46.3437B. doi:10.1063/1.1841236.
- ^ He, Hongliang; Sekine, T.; Kobayashi, T. Direct transformation of cubic diamond to hexagonal diamond. Applied Physics Letters. 2002, 81 (4): 610. Bibcode:2002ApPhL..81..610H. doi:10.1063/1.1495078.
- ^ Kaminskii, F.V.; G.K. Blinova; E.M. Galimov; G.A. Gurkina; Y.A. Klyuev; L.A. Kodina; V.I. Koptil; V.F. Krivonos; L.N. Frolova; A.Y. Khrenov. Polycrystalline aggregates of diamond with lonsdaleite from Yakutian [Sakhan] placers. Mineral. Zhurnal. 1985, 7: 27–36.
- ^ Israde-Alcantara, I.; Bischoff, J.L.; Dominguez-Vazquez, G.; Li, H.-C.; Decarli, P.S.; Bunch, T.E.; et al. Evidence from central Mexico supporting the Younger Dryas extraterrestrial impact hypothesis. Proceedings of the National Academy of Sciences. 2012, 109 (13): E:738–747. Bibcode:2012PNAS..109E.738I. PMC 3324006 . PMID 22392980. doi:10.1073/pnas.1110614109 .
- ^ Kvasnytsya, Victor; Wirth; Dobrzhinetskaya; Matzel; Jacobsend; Hutcheon; Tappero; Kovalyukh. New evidence of meteoritic origin of the Tunguska cosmic body. Planetary and Space Science. August 2013, 84: 131–140. Bibcode:2013P&SS...84..131K. doi:10.1016/j.pss.2013.05.003.
- ^ Redfern, Simon. Russian meteor shockwave circled globe twice. BBC News. British Broadcasting Corporation. [28 June 2013].
- ^ Bundy, F.P.; Kasper, J.S. Hexagonal diamond — a new form of carbon. Journal of Chemical Physics. 1967, 46 (9): 3437. Bibcode:1967JChPh..46.3437B. doi:10.1063/1.1841236.
- ^ He, Hongliang; Sekine, T.; Kobayashi, T. Direct transformation of cubic diamond to hexagonal diamond. Applied Physics Letters. 2002, 81 (4): 610. Bibcode:2002ApPhL..81..610H. doi:10.1063/1.1495078.
- ^ Bhargava, Sanjay; Bist, H.D.; Sahli, S.; Aslam, M.; Tripathi, H.B. Diamond polytypes in the chemical vapor deposited diamond films. Applied Physics Letters. 1995, 67 (12): 1706. Bibcode:1995ApPhL..67.1706B. doi:10.1063/1.115023.
- ^ Nishitani-Gamo, Mikka; Sakaguchi, Isao; Loh, Kian Ping; Kanda, Hisao; Ando, Toshihiro. Confocal Raman spectroscopic observation of hexagonal diamond formation from dissolved carbon in nickel under chemical vapor deposition conditions. Applied Physics Letters. 1998, 73 (6): 765. Bibcode:1998ApPhL..73..765N. doi:10.1063/1.121994.
- ^ Misra, Abha; Tyagi, Pawan K.; Yadav, Brajesh S.; Rai, P.; Misra, D.S.; Pancholi, Vivek; Samajdar, I.D. Hexagonal diamond synthesis on h-GaN strained films. Applied Physics Letters. 2006, 89 (7): 071911. Bibcode:2006ApPhL..89g1911M. doi:10.1063/1.2218043.
- ^ Nur, Yusuf; Pitcher, Michael; Seyyidoğlu, Semih; Toppare, Levent. Facile synthesis of poly(hydridocarbyne): A precursor to diamond and diamond-like ceramics. Journal of Macromolecular Science, Part A. 2008, 45 (5): 358. S2CID 93635541. doi:10.1080/10601320801946108.
- ^ Nur, Yusuf; Cengiz, Halime M.; Pitcher, Michael W.; Toppare, Levent K. Electrochemical polymerizatıon of hexachloroethane to form poly(hydridocarbyne): A pre-ceramic polymer for diamond production. Journal of Materials Science. 2009, 44 (11): 2774. Bibcode:2009JMatS..44.2774N. S2CID 97604277. doi:10.1007/s10853-009-3364-4.
- ^ Lavars, Nick. Scientists produce rare diamonds in minutes at room temperature. New Atlas. 18 November 2020 [12 February 2021].
- ^ McCulloch, Dougal G.; Wong, Sherman; Shiell, Thomas B.; Haberl, Bianca; Cook, Brenton A.; Huang, Xingshuo; Boehler, Reinhard; McKenzie, David R.; Bradby, Jodie E. Investigation of room temperature formation of the ultra-hard nanocarbons diamond and lonsdaleite. Small. 2020, 16 (50): 2004695. ISSN 1613-6829. PMID 33150739. S2CID 226259491. doi:10.1002/smll.202004695.
- ^ Lab made hexagonal diamonds stiffer than natural cubic diamonds. Phys.org. March 2021.
外部链接
- Mindat.org (页面存档备份,存于互联网档案馆) accessed 3/13/05.
- Webmineral (页面存档备份,存于互联网档案馆) accessed 3/13/05.
- Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.
- Frondel, C. & U.B. Marvin (1967), Lonsdaleite, a new hexagonal polymorph of diamond. Nature: 214: 587-589
- Frondel, C. & U.B. Marvin (1967), Lonsdaleite, a hexagonal polymorph of diamond, Am.Min.: 52
- Bianconi, P. et al (2004), Diamond and Diamond-like Carbon from a Preceramic Polymer. J. Am. Chem. Soc. Vol. 126, No. 10, 3191-3202
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