Shipbucket

The best I can do for you is from Friedman's 'Naval Weapons of WW!'
pages 131-133
Mackensen 35cm: "The DrLC/1914 mounting was similar to that of the Baden
Protection 32cm face 20cm sides, 12cm slopes 21cm rear flat roof 11cm

Baden 38cm: A turret Wt 867440kg
Roller bearing ring diam 8.75m; internal barbette diam 10.0m gun axes 3.7m apart. You could scale those down in the ratio 35/38 for the calibres.
Protection 35cm face, 25cm sides, 29cm rear, roof12cm, slopes 20cm front, 12cm sides.
E. Yorck 38cm: 30cm face,25cm sloping face, 15cm roof.

You can either assume 'similar to Baden' means same size, or do some estimates based on gun sizes (which are given for both guns in some detail. Both 45 calibre) Treating the turret as a hollow shell, so weights go as the square of lengths (eg gun calibre) is roughly OK if the armour is comparable. (No use using weight of 6in turrets, some with 1in armour, some with 2in!)
That would make Mackensen's turret about 735000kg if smaller. but only 676000 with armour thinner in same ratio, as Friedman states.
Navweaps will give other turret weights for other ships for comparisons.
HMS Canada with 14in guns had turret revolving weight 660 tons. The roller path diameter was the same as the UK 15in MkI 27ft which had a revolving weight of 770tons. The 13.5in had roller path diam 24ft6, weight of turret 590tons


EDIT of all ship data, I've found accurate reliable turret and gun mounting data, especially weights, hardest to find.