Pizarras Riofrío S.L.
Riofrío de Aliste (Zamora)
   
This slate is quarried in Riofrío de Aliste, province of Zamora (Spain) belonging geologically to the "San Pedro de las Herrerías" formation (Middle-upper Ordovician).

Its main minerals are sericite, chlorite and quartz, and it also contains other opaque minerals an tourmaline.

Its surface is smooth, getting very good pieces for roofs. The quarry presents two different types of slate, grey and black. Pizarras Riofrio markets both types with the references RF-20 and RF-10.

The RF-10 (black) has a great schistity which gives a flat cut, the grain is medium and rough whith great opaqueness which makes it very appreciated for roofing.

The RF-20 (grey) also has a great schistity, the grain is fine and smoother than the black one it is very solid and also very suitable as roofing material.

Thanks to these physical and chemical characteristics this slate is very indicated as material for roof of any shape and slope.

 

Densidad

2,77 g/cm3

Absorción:

0,29 %

Flexión

30,6-45,8 MPa