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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Solid solution, end-member？

又称： solid solution (mineral) · end-member

Definition 7.6 University Earth and Space Sciences — Year 1 · 第 7 章 — Rock-Forming Minerals

A solid solution is a mineral in which one or more structural sites are occupied, in proportions that vary continuously, by two or more ions. The end-members of a solid solution are the compositions at its limits, each with every varying site filled by one ion only; an intermediate composition is given by the mole fractions of the end-members.

The coupled substitution in plagioclase. Replacing a sodium by a calcium in the large site adds one positive charge; replacing a silicon by an aluminium in a tetrahedron removes one. Every intermediate plagioclase Na_1-x Ca_x Al_1+x Si_3-x O_8 is neutral. — The coupled substitution in plagioclase. Replacing a sodium by a calcium in the large site adds one positive charge; replacing a silicon by an aluminium in a tetrahedron removes one. Every intermediate plagioclase $\mathrm{Na}_{1-x}\mathrm{Ca}_x\mathrm{Al}_{1+x}\mathrm{Si}_{3-x}\mathrm{O}_8$ is neutral.

The olivine solid solution as an ideal mixture of forsterite and fayalite, from their measured densities. Left: the molar volume, linear in the composition. Right: the density (solid), slightly above the straight line between the end-members (dashed).

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