Fig. 2From: Bioactive calcium phosphate materials and applications in bone regenerationSchematic illustration of the crystal structure of (a) HAP [172], (b) α-TCP, (c) β-TCP [173], and (d) WH [114]. Copyright 2013 American Chemical Society. TEM and SEM images of (e) HAP [174], (f) α-TCP, (g) β-TCP [175], and (h) WH [117]. XRD data of (i) HAP [174], (j) α-TCP and β-TCP [175], and (k) WH [117]Back to article page