Chalorimetry of high temperature form of cubanite

立方石高温形式的量热法

• 批准号: 61540594
• 负责人: MIZOTA Tadato
• 金额: $ 1.41万
• 依托单位: Faculty of Engineering, Yamaguchi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540594/
• 关键词: adiabatic calorimeter; cubanite; heat capacity; glassy transition; high cubanite; 高温型キューバ鉱; 熱容量異常; GP-IB

Cubanite transforms to high temperature cubic form above 220 C. Calorimetric investigations had been done for the high form which shows anomaly in heat capacity (Mizota et al., 1985). The transition has been explained to be due to glassy transition of metal atoms (Cu anf Fe) in high cubanite, but the proof has not been enough for the sake of calorimetric limitations at that stage of investigation. The present investigation was initiated to clarify the origin of the anomaly of heat capacity revieled between 170 and 300 C. New Type of a small scale adiabatic calorimeter has been developped through the present project. Cubanite sample sealed at low pressure with He in a glass ampoule was supplied for the calorimetric mesurement. The results show no heat relaxation nor heating rate dependency, which indicates the transition belongs to the reversible type caused from metal vibration at elevated temperature above 170 C. The adiabatic calorimeter can be used for various samples which are difficult to obtain enough amount of materials.

古巴岩转化为高于220 C的高温立方形式。高温研究是针对热能异常的高形式进行的（Mizota等，1985）。该过渡已被解释为是由于高古巴岩中金属原子的玻璃状过渡（Cu anf fe）引起的，但是在调查的那个阶段，证明还不够以量热的限制。本研究的开始是为了阐明170至300 C之间的热容量的异常。在玻璃放大器中，为量热的介质提供了在低压下密封的古巴矿物样品。结果表明，没有热放松和加热速率依赖性，这表明过渡属于高于170 C的金属振动引起的可逆类型。绝热热量计可用于各种样品，这些样品难以获得足够数量的材料。

项目成果

Tadato MIZOTA: "Calorimetry of sulfides and sulfide minerals" Journal of the Meneralogical Society of Japan. 18. 99-114 (1987)

Tadato MIZOTA：“硫化物和硫化物矿物的量热法”日本矿物学会杂志。