extract of Acta Cryst. 22,(1967), 885

[...]

                  
Experimental

Our crystals of p-aminobenzoic acid were obtained by
evaporation of aequeous ethanol and methanol solu-
tions. They grow in the form of long, fibrous needles
similar to modification I found by KWTY; we have 
not obtained the other forms reported by them, nor
that reported by Prasad, Kapadia & Thakar (1937)
and, more recently, by All‚aume, Salas-Ciminago &
Decap (1966). Since the crystals shatter when cut with
a razor blade, all photographs were taken with crystals
mounted along the needle (b) axis.

[...]

Table 2. The heavy atom parameters 
        
           
Molecule A   X      Y      Z

N           .3461  .5079  -.1666
C(1)        .1542  .2733  -.0711
C(2)        .2214  .1898  -.0372
C(3)        .2842  .2738  -.0675
C(4)        .2829  .4379  -.1343
C(5)        .2160  .5258  -.1686
C(6)        .1531  .4422  -.1374
C(7)        .0879  .1681  -.0394
O(1)        .0866  .0089   .0180
O(2)        .0276  .2586  -.0754

Molecule B   X      Y      Z

N           .3304  -.5445  .3401
C(1)        .4286  -.2821  .1518
C(2)        .4624  -.2073  .2194
C(3)        .4309  -.2967  .2817
C(4)        .3642  -.4648  .2783
C(5)        .3300  -.5452  .2111
C(6)        .3622  -.4530  .1489
C(7)        .4615  -.1727  .0862
O(1)        .5213  -.0236  .0883
O(2)        .4248  -.2343  .0262