Pentlandite, heazlewoodite e cerargirite in rocce ultrafemiche dell'Appennino Parmense
Pentlandite, heazlewoodite and cerargyrite have been separated from ultramaphic rocks in Apennines near Parma by isopicnometric and magnetic isodynamic methods and identified by X-ray diffraction and emission spectrography. The last mineral seems not to have been found before in ultramaphic rocks.