Tantalcarbide (Ta,Nb)C and Niobocarbide (Nb,Ta)C
Aktai river, near Kushva, Nijni Tagil, Ural, Russia
Reflected light microscope
Photo and coll. P. Perroud. Specimen Walther -> ? -> Krantz -> Jedwab -> Novgorodova -> Jedwab -> Perroud
Tantalcarbide (Ta,Nb)C and Niobocarbide (Nb,Ta)C
Clearer concentric zones: Ta>Nb; darker concentric zones: Nb>Ta
Aktai river, near Kushva, Nijni Tagil, Ural, Russia
Scanning electron microscope, SSTE UNIGE
Photo A. Martignier, coll. P. Perroud (now in NHM Geneva).
Specimen Walther -> ? -> Krantz -> Jedwab -> Novgorodova -> Jedwab -> Perroud
See also: Jedwabite
