The average compositions of menshikovite (Pd3Ni2As3) from the type, localit
y (Lukkulaisvaara layered intrusion, Russian Karelia) and a Pd-Ni arsenide
synthesized at 450 degrees C, are very close. The observed Sigma Metal:As r
atio is close to 5.3, as in the case of previously described arsenides from
the Stillwater and Two-Duck Lake intrusions. The compositions suggest that
these unnamed Pd-Mi arsenides and the synthetic phase are in fact menshiko
vite.