Cite the two desirable characteristics of clay minerals relative to fabrication processes.

First, let's take a look at the properties of clay minerals. Clay minerals are hydrous layered silicates that have a range of characteristics, including their particle size, plasticity, and ability to form colloidal suspensions when mixed with water. Some popular types of clay minerals used in fabrication processes include kaolinite, montmorillonite, and illite.

As the question is asking us about two desirable characteristics relative to fabrication processes, we want to focus on the properties that make clay minerals suitable for various processes. The most relevant properties are generally their plasticity and ability to form colloidal suspensions when mixed with water.

Plasticity, the ability of clay minerals to be molded and maintain their shape when subject to stress, is particularly important for fabrication processes that involve shaping and forming. In these processes, clay minerals are often used as a binder or as a main component of the material being shaped. High plasticity allows for easy deformation without cracking and helps the clay maintain its shape during drying and firing.

Clay minerals can form colloidal suspensions when mixed with water, meaning that they disperse uniformly throughout the liquid. This property is important for fabrication processes that involve mixing clay minerals with water, such as slip casting and slurry processing. Colloidal suspensions improve the consistency of the mixture, ensure even distribution of particles, and ultimately result in a uniform final product with superior strength characteristics. To summarize, the two desirable characteristics of clay minerals relative to fabrication processes are: 1. Plasticity: The ability to be molded and maintain their shape under stress, which is beneficial for shaping and forming processes where clay minerals act as binders or main components. 2. Colloidal suspensions: The ability to form uniform mixtures when mixed with water, which is essential for fabrication processes that involve mixing clay minerals with water to ensure even distribution and a consistent final product.