Witherite originates from the biochemical sedimentation of barium in sea water. Due to the complexity of the metallogenic environment, witherite appears in many morphologies. However, the relationship between its diverse morphologies and its mineralisation environment is not well understood. In this paper, Ca2+, a common substitute for Ba2+, and mixed protein (egg white) were used to simulate the inorganic and organic environments of witherite mineralisation, respectively. Comparison of samples prepared under different conditions showed that Ca2+ and egg white have relatively independent regulatory effects on the mineralisation of witherite particles. Egg white primarily limits the growth of the nanocrystals, while Ca2+ directs their non-isodiametric growth. Results shows that Ca2+ is distributed along a gradient in nanocrystalline witherite particles, with the Ca2+ content being proportional to the diameter of the nanocrystals. The results of this study shed light on the different roles of organic matter and inorganic ions in the formation of witherite and offer insight into the genesis of its various morphologies.

堇青石起源于海水中钡的生化沉淀。由于成矿环境的复杂性，钙铁矿以许多形态出现。但是，人们对其形态和矿化环境之间的关系还没有很好的了解。在本文中，使用Ca 2+（一种常见的Ba 2+替代品）和混合蛋白（例如鸡蛋白）分别模拟了镁橄榄石矿化的无机和有机环境。在不同条件下制备的样品的比较表明，Ca 2+和蛋清对堇青石颗粒的矿化具有相对独立的调节作用。蛋清主要限制了纳米晶体的生长，而Ca 2+指导他们的非等径增长。结果表明，Ca 2+在纳米晶堇青石颗粒中沿梯度分布，其中Ca 2+含量与纳米晶的直径成正比。这项研究的结果揭示了有机物和无机离子在钙铁矿形成中的不同作用，并提供了洞悉其各种形态的成因的见解。