FIG. 1. Bridge (a) and h111i dumbbell (b) interstitial defects in tungsten. The h111i crowdion configuration closely resembles the h111i dumbbell configuration with a slightly larger spacing of the defect atoms along the h111i axis. The figure shows a slice parallel to {110}. Small (blue) spheres indicate tungsten atoms whereas large (gray) spheres indicate extrinsic atoms (V, Ti, Re). Thicker (yellow) cylinders indicate bond lengths shorter than 2.3 °A whereas thinner (gray) cylinders indicate bond lengths shorter than 2.5 °A. The bond angle  is indicated in (a).

FIG. 1. Bridge (a) and h111i dumbbell (b) interstitial defects in
tungsten. The h111i crowdion configuration closely resembles the
h111i dumbbell configuration with a slightly larger spacing of the
defect atoms along the h111i axis. The figure shows a slice parallel
to {110}. Small (blue) spheres indicate tungsten atoms whereas large
(gray) spheres indicate extrinsic atoms (V, Ti, Re). Thicker (yellow)
cylinders indicate bond lengths shorter than 2.3 °A whereas thinner
(gray) cylinders indicate bond lengths shorter than 2.5 °A. The bond
angle  is indicated in (a).