  Results are reported of an experimental search for the unique, rapidly
varying temporal pattern of solar axions coherently converting into photons via
the Primakoff effect in a single crystal germanium detector. This conversion is
predicted when axions are incident at a Bragg angle with a crystalline plane.
The analysis of approximately 1.94 kg.yr of data from the 1 kg DEMOS detector
in Sierra Grande, Argentina, yields a new laboratory bound on axion-photon
coupling of $g_{a\gamma \gamma} < 2.7\cdot 10^{-9}$ GeV$^{-1}$, independent of
axion mass up to ~ 1 keV.
