Synthesis and characterization of gem diamond single crystals in Fe-C system under high temperature and high pressure

2020 ◽  
Vol 531 ◽  
pp. 125371
Author(s):  
Zhanke Wang ◽  
Hongan Ma ◽  
Shuai Fang ◽  
Zhiqiang Yang ◽  
Xinyuan Miao ◽  
...  
CrystEngComm ◽  
2018 ◽  
Vol 20 (36) ◽  
pp. 5457-5464 ◽  
Author(s):  
Longsuo Guo ◽  
Hongan Ma ◽  
Liangchao Chen ◽  
Ning Chen ◽  
Xinyuan Miao ◽  
...  

In the NiMnCo–C system, diamond single crystals have been successfully synthesized by adding C3H5N3O as an organic additive under 5.5–6.2 GPa and 1280–1320 °C.


2011 ◽  
Vol 66 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Stephanie C. Neumair ◽  
Johanna S. Knyrim ◽  
Oliver Oeckler ◽  
Reinhard Kaindl ◽  
Hubert Huppertz

The cubic iron hydroxy boracite Fe3B7O13OH・1.5H2O was synthesized from Fe2O3 and B2O3 under high-pressure/high-temperature conditions of 3 GPa and 960 °C in a modified Walker-type multianvil apparatus. The crystal structure was determined at room temperature by X-ray diffraction on single crystals. It crystallizes in the cubic space group F4̄3c (Z = 8) with the parameters a = 1222.4(2) pm, V = 1.826(4) nm3, R1 = 0.0362, and wR2 = 0.0726 (all data). The B-O network is similar to that of other cubic boracites.


Author(s):  
Gunter Heymann ◽  
Elisabeth Selb ◽  
Toni Buttlar ◽  
Oliver Janka ◽  
Martina Tribus ◽  
...  

By high-pressure/high-temperature multianvil synthesis a new high-pressure (HP) phase of Co3TeO6 was obtained. The compound crystallizes in the acentric trigonal crystal system of the Ni3TeO6-type structure with space group R3...


2020 ◽  
Vol 75 (6-7) ◽  
pp. 597-603
Author(s):  
Birgit Fuchs ◽  
Hubert Huppertz

AbstractThe non-centrosymmetric scandium borate ScB6O9(OH)3 was obtained through a high-pressure/high-temperature experiment at 6 GPa and 1473 K. Single-crystal X-ray diffraction revealed that the structure is isotypic to InB6O9(OH)3 containing borate triple layers separated by scandium layers. The compound crystallizes in the space group Fdd2 with the lattice parameters a = 38.935(4), b = 4.4136(4), and c = 7.6342(6) Å. Powder X-ray diffraction and vibrational spectroscopy were used to further characterize the compound and verify the proposed structure solution.


2020 ◽  
Vol 59 (6) ◽  
pp. 3579-3584
Author(s):  
Sun Woo Kim ◽  
Xiaoyan Tan ◽  
Corey E. Frank ◽  
Zheng Deng ◽  
Huaiyu Wang ◽  
...  

2011 ◽  
Vol 11 (4) ◽  
pp. 1006-1014 ◽  
Author(s):  
Xiaobing Liu ◽  
Xiaopeng Jia ◽  
Zhuangfei Zhang ◽  
Ming Zhao ◽  
Wei Guo ◽  
...  

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