Strongly coupled dusty plasmas are formed by suspending micron-sized d
ust particles in strata of a de glow neon discharge. We have observed
for the first time an ordered structure of the negatively charged part
icles trapped in the strata region. Image analysis reveals the crystal
line structure, which is consistent with a large value of the Coulomb
coupling parameter. (C) 1997 Elsevier Science B.V.