Minerals and slags from CyprusLéon Brun and Claude Frédéric-Armand Schaeffer

6.

Silica (SiO²) ..................... 0,20 Alumina (Al²O³) .................. 7,29 Iron oxide (Fe²O³) ............. 58,71 Lime (CaO) ....................... 0,30 Magnesia (MgO) .................... traces Copper oxide (CuO) ............. traces Phosphoric anhydride ........... 0,023 Total sulphur ...................... 45,96 Sulphuric anhydride ............. 2,43 Arsenic ........................... 0,025

We note the absence of tin, lead, nickel, cobalt.

The preceding analysis can be expressed by the following, which gives the actual composition of the sample:

Silica (SiO²) ..................... 0,20 Alumina (Al²O³) .................. 7,29 Iron sulphide (FeS²) ............. 84,35 Iron sulphate (SO⁴Fe) ............ 4,62 Iron oxide (FeO) ................ 3,34 Lime (CaO) ....................... 0,50 Magnesia (MgO) .................... traces Phosphoric anhydride (P²O⁵) .... 0,023 Arsenic ........................... 0,025

This ore is a slightly altered iron sulphide.

This sample takes the form of a white, polished block, covered with a little copper carbonate.

Analysis:

Carbonic acid (CO²) .......... 46,04 Silica (SiO²) ..................... I,50 Alumina (Al²O³) .................. 0,26 Iron oxide (Fe²O³) ............. 0,90 Lime (CaO) ...................... 30,00 Magnesia (MgO) ................... I9,45 Copper carbonate .............. I,86 Sulphur ............................ 0,09 Phosphorus ......................... 0 Manganese ......................... 0

In fact, we are dealing with a good-quality dolomite, that is a natural carbonate of lime and magnesia covered with a light layer of copper carbonate.

Homécourt, le I2 Mars I934.- … continues