act turns first on the question of whether the claimant is an employee of the person or entity against whom the claim is brought there are a number of different statutory definitions for the nouns employer and employee in the act but no definition for the verb employ
Silicates are minerals that contain silicon atoms bonded to oxygen atoms. The basic building block for all silicate minerals is called a tetrahedron, where one silicon atom is bonded to 4 oxygen atoms (Figure 3.6).Silicate minerals also often contain other elements, such as calcium, iron, and magnesium.ilicates are minerals that contain silicon atoms bonded to oxygen atoms. The basic building block for all silicate minerals is called a tetrahedron, where one silicon atom is bonded to 4 oxygen atoms (Figure 3.6).
Silicates. The fundamental structural unit is the silicon and oxygen tetrahedron. The four oxygens sit on the corners of the tetrahedon and the silicon sits at the center. These tetrahedra can be arranged in various ways by sharing one or more oxygens between adjacent tetrahedra. There are some 3,500 recognized minerals found on Earth. For our purpose, we can focus on about a dozen.