Radiographic elements with improved covering power

A silver image forming radiographic element comprised of

• a transparent support and coated thereon
• at least one hydrophilic colloid layer including an emulsion layer containing radiation sensitive silver bromide, silver bromochloride or silver bromoiodide grains having a mean equivalent circular diameter of at least 0.3 .mu.m and a grain population wherein at least 50 percent of the total grain population projected area is accounted for by tabular grains having a tabularity of greater than 8, as determined by the relationship:
• ##EQU4## wherein T is tabularity;
• ECD is the mean effective circular diameter in .mu.m of the tabular grains;
• and
• t is the mean thickness in .mu.m of the tabular grains,
• said element including in said emulsion layer or in a hydrophilic colloid layer contiguous to said emulsion layer an azole in a concentration effective to increase the covering power of the silver image, the azole having the formula:
• ##STR36## wherein Z is --N.dbd. or --C(R.sup.5).dbd.;
• L is a divalent aliphatic linking group containing 1 to 8 carbon atoms;
• T is an aliphatic terminal group containing 1 to 10 carbon atoms;
• m is 0 or 1;
• n is an integer of 2 to 4;
• p is an integer of 2 to 4 and
• R.sup.4 and R.sup.5 together complete a 5 or 6 member heterocyclic nucleus containing 1 to 3 ring nitrogen atoms or
• R.sup.4 is hydrogen, an aliphatic group of 1 to 8 carbon atoms or an aromatic group of 1 to 8 carbon atoms and
• R.sup.5 is hydrogen, --NH.sub.2, an aliphatic group of 1 to 8 carbon atoms or an aromatic group of 1 to 8 carbon atoms.