Faience Glass Composition Ratio Tool

Convert measured glass oxide mass percentages to soda/silica and lime/silica molar ratios using supplied oxide molar masses; no recipe, phase or provenance classification.

Description

Oxide mass percentages and molar ratios describe different composition bases.

Oxide mass percentages and molar ratios describe different composition bases. Converting each oxide by its supplied molar mass allows soda/silica and lime/silica comparisons without treating mass shares as mole shares.^[1]

Convert measured glass oxide mass percentages to soda/silica and lime/silica molar ratios using supplied oxide molar masses; no recipe, phase or provenance classification.

When to use Faience Glass Composition Ratio Tool

Use this tool to convert measured glass oxide mass percentages to soda/silica and lime/silica molar ratios using supplied oxide molar masses; no recipe, phase or provenance classification.

Prepare the artifact, site or survey measurements and any independently established calibration or model choices. Keep paired observations aligned and confirm units and coordinate conventions.

How to use Faience Glass Composition Ratio Tool and understand its results

Prepare the artifact, site or survey measurements and any independently established calibration or model choices. Keep paired observations aligned and confirm units and coordinate conventions.
Enter silicaMassPercent, sodaMassPercent, limeMassPercent, otherMassPercent, silicaMolarMass, sodaMolarMass, limeMolarMass using the field table and calculation rules, then run the tool.
Read sodaSilicaMolarRatio, limeSilicaMolarRatio, reportedTotalMassPercent. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
silicaMassPercent	Silica mass percent	number	Required
sodaMassPercent	Soda mass percent	number	Required
limeMassPercent	Lime mass percent	number	Required
otherMassPercent	Other mass percent	number	Required
silicaMolarMass	Silica molar mass	number	Required
sodaMolarMass	Soda molar mass	number	Required
limeMolarMass	Lime molar mass	number	Required

Enter positive silica percentage and molar masses, and nonnegative soda, lime and other percentages. Total declared mass percentage may not exceed 100 except for a 10⁻⁸ rounding allowance. Return soda/silica and lime/silica molar ratios and the reported total percentage.

soda/silica = (sodaPercent/M_soda)/(silicaPercent/M_silica)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
sodaSilicaMolarRatio	Soda silica molar ratio	number
limeSilicaMolarRatio	Lime silica molar ratio	number
reportedTotalMassPercent	Reported total mass percent	number

json

{
  "input": {
    "silicaMassPercent": 60,
    "sodaMassPercent": 20,
    "limeMassPercent": 10,
    "otherMassPercent": 10,
    "silicaMolarMass": 60,
    "sodaMolarMass": 62,
    "limeMolarMass": 56
  },
  "output": {
    "sodaSilicaMolarRatio": 0.3225806451612903,
    "limeSilicaMolarRatio": 0.17857142857142858,
    "reportedTotalMassPercent": 100
  }
}

Limitations and assumptions

The supplied oxide identities and molar masses define the conversion. Incomplete assay totals are retained, and the tool does not identify a recipe, phase or provenance.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Copper Alloy Tin Percent: Report measured tin share on the copper-plus-tin subsystem and incomplete declared assay closure; undeclared material is not automatically copper or an alloy identity. For a complementary task, use XRF Element Ratio Provenance Tool: Blank/response-correct paired XRF element signals and screen a supplied source ratio band; signed numerator nondetections remain visible and a single ratio does not identify provenance.

References

Faience Glass Composition Ratio Tool — tool.io

Similar or alternative tools

Copper Alloy Tin Percent
Report measured tin share on the copper-plus-tin subsystem and incomplete declared assay closure; undeclared material is not automatically copper or an alloy identity.
XRF Element Ratio Provenance Tool
Blank/response-correct paired XRF element signals and screen a supplied source ratio band; signed numerator nondetections remain visible and a single ratio does not identify provenance.