Phase transitions of sulfur under high-pressure and high-temperature condition

高压高温条件下硫的相变

• 批准号: 15540456
• 负责人: KUSABA Keiji
• 金额: $ 1.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540456/
• 关键词: sulfur; multi-anvil type apparatus; synchrotron radiation; sintered diamond; phase transition; crystal structure; compression curve; P-T phase diagram; 高温高圧

High-pressure and high-temperature behavior of sulfur was directly observed, using a combination of multi-anvil type high-pressure apparatus"MAX80"and synchrotron radiation. Observable pressure and temperature range was expanded up to 17 GPa and 900℃ by using sintered diamond anvils. Three high-pressure phases were found in the range. All high-pressure phases were unquenchable at ambient condition. Crystal structures of the high-pressure phases were determined from their X-ray powder diffraction patterns. The high-pressure phase 1 has a hexagonal cell, in which sulfur atoms form helical chains. The high-pressure phase 2 has another hexagonal cell and the structure is built up of cyclic molecule of S_6. The high-pressure phase 3 contains another helical chains in a tetragonal cell. Compression behaviors of all high-pressure phases and the low-pressure phase were observed at room temperature condition. An anisotropic compression behavior was found in the case of the high-pressure phase 2. The pressure and temperature phase diagram of sulfur was also determined, based on the in-situ observations.

采用多砧式高压装置MAX80和同步辐射相结合的方法，直接观测了硫磺的高温高压行为。通过使用烧结的金刚石顶锤，将可观测的压力和温度范围扩大到17 Gpa和900℃。在该范围内发现了三个高压相。所有高压相在环境条件下都是不能熄灭的。通过X射线粉末衍射图确定了高压相的晶体结构。高压相1具有六方晶胞，硫原子在其中形成螺旋链。高压相2具有另一个六方晶胞，其结构是由S_6的环状分子构成。高压相3在四方晶胞中含有另一个螺旋链。在室温条件下，观察了所有高压相和低压相的压缩行为。在高压相2的情况下发现了各向异性的压缩行为。在现场观测的基础上，确定了硫的压力和温度相图。

项目成果

日本におけるマルチアンビル型高圧装置の創世記

日本多砧式高压设备的起源

• 发表时间: 2004
• 期刊: 高圧力の科学と技術 14
• 作者: Shimoda G.;Ikeda Y.;Kita N.T.;Morishita Y;Imae N.;Imae N.;Imae N.;N.Imae;草場啓治;Keiji KUSABA;草場啓治;Keiji KUSABA;Keiji KUSABA;草場啓治
• 通讯作者: 草場啓治

Reversible phase transition of Zn(OH)2 under hydrostatic condition

静水条件下Zn(OH)2的可逆相变

• 发表时间: 2004
• 期刊: PF Activity report B21
• 作者: Shimoda G.;Ikeda Y.;Kita N.T.;Morishita Y;Imae N.;Imae N.;Imae N.;N.Imae;草場啓治;Keiji KUSABA;草場啓治;Keiji KUSABA;Keiji KUSABA;草場啓治;Keiji KUSABA
• 通讯作者: Keiji KUSABA

粉末X線回折パターンの指数付け法

粉末X射线衍射图谱的索引方法

• 发表时间: 2005
• 期刊: 高圧力の科学と技術 15
• 作者: Shimoda G.;Ikeda Y.;Kita N.T.;Morishita Y;Imae N.;Imae N.;Imae N.;N.Imae;草場啓治
• 通讯作者: 草場啓治

Phase relationship of sulfur up to 8 GPa

硫的相关系高达 8 GPa

• 发表时间: 2004
• 期刊: PF Activity report B21
• 作者: Shimoda G.;Ikeda Y.;Kita N.T.;Morishita Y;Imae N.;Imae N.;Imae N.;N.Imae;草場啓治;Keiji KUSABA;草場啓治;Keiji KUSABA
• 通讯作者: Keiji KUSABA

Genesis of multi-anvil high pressure apparatus in Japan

日本多砧高压装置的起源

• 发表时间: 2004
• 期刊: Rev.High Press.Sci.Tec. 14
• 作者: Shimoda G.;Ikeda Y.;Kita N.T.;Morishita Y;Imae N.;Imae N.;Imae N.;N.Imae;草場啓治;Keiji KUSABA;草場啓治;Keiji KUSABA;Keiji KUSABA;草場啓治;Keiji KUSABA;Keiji KUSABA
• 通讯作者: Keiji KUSABA