Feldespato sódico FN-72

What it is

Kind

Feldspars and stones

Formula

SiO₂ 71.25%, Al₂O₃ 17.7%, Na₂O 7%, K₂O 1.5%, CaO 0.45%, MgO 0.13%, TiO₂ 0.3%, Fe₂O₃ 0.2%, LOI 1.5%

Also called

FN-72, FN72, Feldespato Sódico SPS, Feldspath sodique FN72, Feldspath sodique SPS, Prodesco 50101502, Soda feldspar FN-72

Made by

Sold under the Prodesco S.L. brand (Manises, Valencia, Spain); the mine is not stated

Sold in

EU

Similar materials

Natronfeldspat (Bodmer 549) , Soda Feldspar (Bath Potters / CTM)

Source

Prodesco technical sheet 'Feldespato sódico FN-72', revision 5 of 14/07/2020 (copy hosted by Artbendix) (2020-07)

Spanish soda feldspar sold to potters by Prodesco and by shops that stock its range (Marphil, Kádar), and in France by Solargil as 'Feldspath sodique FN72'. Prodesco gives it as 61% albite, 7% orthoclase, 8% anorthite and 24% quartz, so it carries a lot of free silica.

Oxide analysis and unity formula

Glazecalc has the analysis of Feldespato sódico FN-72 as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Feldespato sódico FN-72 that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.

Equivalent weight

713.69

Fired weight

702.99

Loss on ignition

1.5%

The equivalent weight is the grams of Feldespato sódico FN-72 that hold 1.0 mole of flux. The fired weight is what is left of that after firing.

Hazards and safety

Hazards: About 24% quartz by the supplier's mineral analysis, so the dust contains respirable crystalline silica; avoid breathing it.

Glazecalc shows the hazard wording as its record gives it. It is not a full risk assessment, so read the safety data sheet from your supplier. Before you handle any glaze material, read Safe mixing and ventilation and Glaze safety at home.

Use it in a recipe

Add Feldespato sódico FN-72 to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.

Open the recipe calculatorAll standard materials