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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ishita Das posted an Question
November 11, 2020 • 13:21 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
The general formula of an amphibole mineral is ag 1b,ctso2o)2 where a. b. c. and t are cationic sites with different co-ordination numbers as stated below: a 12
The general formula of an amphibole mineral is Ag 1B,CTsO2O)2 where A. B. C. and T are cationic sites with different co-ordination numbers as stated below: A 12, B-6-8, C-6, T-4. The amount of tetrahedral Al in the edinite component of amphibole of composition Naqo6Ca)Mgs gAls 0Si62022(OH);is
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Rahul kumar Best Answer
Answer= 1.8 The amount of tetrahedral Al = Tetrahedral cations required to complete the Amphibole structure - Number of Si present as tetrahedral cation = 8.0 - 6.2 = 1.8 So, 1.8 Al is present as tetrahedral cation and remaining 1.2 (= 3.0 - 1.8) is present as octahedral Al in the given Edinite formula.