The　effect　of　different　salt　additions　on　the　granular　microstructure　of　samples　of　the　high　temperature　superconductor　YBa2Cu3O7-delta　(YBCO)　synthesized　by　a　biomimetic　method　has　been　investigated.　Attempting　biotemplating　using　salts　with　the　rock-salt　structure,　most　such　salts　were　found　to　be　chemically　compatible　with　the　YBCO　biosynthesis,　but　only　NaCl　and　KCl　were　observed　to　result　in　the　desirable　strongly　anisotropic　platelet　growth　to　form　clusters　with　localized　orientational　alignment.　Broadening　the　range　of　additions　to　other　chloride　salts　of　varying　structures　resulted　in　an　increase　in　the　CuO　impurity　content　of　the　samples,　but　with　all　the　YBCO　formed　exhibiting　platelet　growth.　Chloride　salts　are　therefore　considered　to　be　good　candidates　for　addition　to　the　biomimetic　YBCO　synthesis　in　order　to　achieve　anisotropic　platelet　growth.