Question: One of the common rock forming
One of the common rock-forming minerals is plagioclase feldspar which contains variable amounts of Na and Ca in addition to Al, Si, and 0. Pure Na-plagioclase has the formula NaA1Si3O3. Because the sizes of Nat+1 and Cat+2 ions are similar (see Table 2.1), Cat+2 can substitute for Na+1. Would the formula of Ca-plagioclase be CaAlSi3O8? Explain.
Relevant QuestionsMost plagioclase contains both Na and Ca. How is the apparent charge imbalance accommodated? (Hint: The solution involves more ionic substitutions.)At a glance, quartz and calcite may look alike. What physical properties distinguish them?The 180-lb iron worker is secured by a fall-arrest system consisting of a harness and lanyard AB, which is fixed to the beam. If the lanyard has slack of 4 ft determine the average impulsive force developed in the lanyard if ...The twitch in a muscle of the arm develops a force which can be measured as a function of time as shown in the graph. If the effective contraction of the muscle lasts for a time t0, determine the impulse developed by the ...(Length: 1548 words) It is not merely Alexander Selkirk in his solitary island who yearns for friendship, but it is common man’s yearning. A life without friendship is purposeless. Friendship is like a ring wearing of ...
Post your question