Mineral Oxide Molar Proportion Term Tool

Description

Divide mass by molar mass, then multiply oxide moles by each formula count.

Stoichiometric calculations translate supplied amounts, formula counts, site occupancies, and valences into a common formula-unit basis. Arithmetic charge or occupancy balance does not prove that a mineral composition is chemically realizable.

Divide mass by molar mass, then multiply oxide moles by each formula count.

When to use this tool

Use Mineral Oxide Molar Proportion Term when you need one supplied-formula, charge, or occupancy term.

How to use the tool and how it works

Enter oxideMass, oxideMolarMass, cationsPerFormula, oxygensPerFormula. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read oxideMoles, cationMoles, oxygenMoles. Use the output convention below.

Require nonnegative oxideMass, positive oxideMolarMass, and positive integer cationsPerFormula and oxygensPerFormula. Divide mass by molar mass, then multiply oxide moles by each formula count.^[1]

Input field	Meaning and units	Accepted input
oxideMass	Oxide Mass	Required. Finite number; minimum 0.
oxideMolarMass	Oxide Molar Mass	Required. Finite number; strictly above 0.
cationsPerFormula	Cations Per Formula	Required. Safe integer; minimum 1.
oxygensPerFormula	Oxygens Per Formula	Required. Safe integer; minimum 1.

Output field	Interpretation	Returned shape
oxideMoles	Oxide Moles	Required. Finite number.
cationMoles	Cation Moles	Required. Finite number.
oxygenMoles	Oxygen Moles	Required. Finite number.

json

{
  "input": {
    "oxideMass": 60,
    "oxideMolarMass": 60,
    "cationsPerFormula": 1,
    "oxygensPerFormula": 2
  },
  "output": {
    "oxideMoles": 1,
    "cationMoles": 1,
    "oxygenMoles": 2
  }
}

Limitations and assumptions

Mass and molar-mass units must be compatible. The caller supplies oxide stoichiometry; the tool does not parse a chemical formula or normalize a whole mineral analysis.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Normalize and evaluate the complete mineral analysis using the intended chemical model. Verify formulas, molar masses, oxidation states, site capacities, and analytical uncertainty independently.

References

Calculation and input contract: geochemistry/mineral-oxide-molar-proportion-term — tool.io

Similar or alternative tools

Oxide Element Molar Factor Sign
Compute elementMoles as oxide moles times atom count plus signedCorrection, then multiply by molar mass for elementMass.
Element Oxide Basis Factor
Sum formula masses, then return element mass fraction, its reciprocal oxide-per-element factor, and a JSON pair of the labels.