Hydroxyapatite (HA) is a calcium phosphate compound that is used as a substitute for damaged body tissues, such as bone and dental implants. HA has been synthesized from the serai snail shells and the mangrove crab of west Tanjung Jabung, Jambi province using the dry method. Calcination of the shell at 1000 C for 12 hours produces CaO, then contact of CaO with air produces Ca(OH)₂ which is used as a source of calcium in HA synthesis. Milling time variations for 0 hours, 3 hours, and 6 hours. Sintering at 600 C for 2 hours produces HA as characterized by using X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and particle size analysis using Particle Size Analyzer (PSA). HA which has the highest accuracy of lattice parameters is that which is milling for 3 hours. The diffraction pattern shows the formation of the HA phase accompanied by several other calcium phosphate phases at an angle of 2θ. The FTIR spectrum shows the presence of PO₄ ^3- and OH⁻groups from HA. PSA analysis shows the longer the milling makes the smaller particle size.

羟基磷灰石 (HA) 是一种磷酸钙化合物，可用作受损身体组织的替代品，例如骨骼和牙科植入物。HA 已使用干法从占碑省西丹绒加蓬的 serai 蜗牛壳和红树林蟹中合成。壳在 1000 C 下煅烧 12 小时产生 CaO，然后 CaO 与空气接触产生 Ca(OH) ₂在 HA 合成中用作钙的来源。研磨时间变化为 0 小时、3 小时和 6 小时。在 600°C 下烧结 2 小时产生 HA，其特征在于使用 X 射线衍射 (XRD)、傅里叶变换红外 (FTIR) 和使用粒度分析仪 (PSA) 进行的粒度分析。晶格参数精度最高的HA是研磨3小时的HA。衍射图显示了 HA 相的形成，并伴有其他几个以 2θ 角的磷酸钙相。FTIR 光谱显示存在来自 HA的 PO ₄ ^3-和 OH ^-基团。PSA 分析显示研磨时间越长，粒径越小。