Powder Data for Some Brown Pigments

The X-ray powder diffraction data are given for a group of brown pigments (C.I. Pigment Brown 1; C.I. Pigment Brown 2; C.I. Pigment Brown 22; C.I. Pigment Brown 23; C.I. Pigment Brown 24; C.I. Pigment Brown 29; C.I. Pigment Brown 31; C.I. Pigment Brown 38), produced from the ‘as received’ colorants, together with information on the source of the material and comment on the patterns