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Oxide Composition Analysis and Calculation of Molecules, Assignments of Petrology

University of MadrasPetrology

A table of various oxides, their molecular weights, and molecular proportions. It also includes instructions for calculating the moles of each oxide based on their percentage in a sample. Useful for students studying chemistry, particularly those focusing on inorganic compounds and analytical techniques.

Typology: Assignments

2020/2021

Uploaded on 11/15/2021

shanmugasundharam-a
shanmugasundharam-a 🇮🇳

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Oxides SiO2Al2O3TiO2Fe2O3FeO MgO MnO CaO Na2O K2O P2O3
Percentage
Analysis
Molecular
Weights
Molecular
Proportions
NIGGLI VALUES
Calculation of Molecules
1. al = Al2O3 =
2. fm = FeO + 2Fe2O3+ MnO + MgO =
3. c = CaO =
4. alk = Na2O+K2O =
Recalculation to 100 %
1. al =
2. fm =
3. c =
4. alk =
1. Si=SiO2X100
al+fm+c+alk =¿
2. Ti=TiO2X100
al+fm+c+alk =¿
3. K=K2OX 100
al+fm+c+alk =¿
4. Mg=MgOX 100
al+fm+c+alk =¿
5. P=P2O5X100
al+fm+c+alk =¿
pf2

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Oxides SiO 2 Al 2 O 3 TiO 2 Fe 2 O 3 FeO MgO MnO CaO Na 2 O K 2 O P 2 O 3 Percentage Analysis Molecular Weights Molecular Proportions

NIGGLI VALUES

Calculation of Molecules

  1. al = Al 2 O 3 =
  2. fm = FeO + 2Fe 2 O 3 + MnO + MgO =
  3. c = CaO =
  4. alk = Na 2 O+K 2 O = Recalculation to 100 %
  5. al =
  6. fm =
  7. c =
  8. alk =
  9. Si = SiO 2 X 100 al + fm + c + alk
  1. Ti = TiO 2 X 100 al + fm + c + alk

3. K =

K 2 OX 100

al + fm + c + alk

  1. Mg = MgOX 100 al + fm + c + alk

5. P =

P 2 O 5 X 100

al + fm + c + alk