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福建省平潭岛角闪辉长岩中有６０％～７０％的矿物为培长石（简称平潭培长石），电子探针分析显示其牌号变化在８４～８８范围内。电子衍射研究表明培长石晶体结构为原始格子，但ｃ和ｄ类衍射漫散，并有拉长现象，且ｃ和ｄ两类衍射相对于ａ和ｂ类衍射的强度在各个选区有变化。电子显微学研究发现该矿物晶体广泛发育着一种非常细小的调制结构，调制结构延长方向近于平行（０１０）。钠长石律双晶也是非常常见的现象。此外，在该晶体中广泛存在着由位错发育而成的小角晶界，这些晶界是岩浆期后热液的通道，并在其间生出层状硅酸盐矿物。作者认为，近于平行（０１０）的调制是一种成分调制，也就是由富钙和略贫钙的畴区相间构成的调制。作为Ｈｕｔｅｎｌｏｃｈｅｒ连晶中的富钙相的培长石（Ａｎ８５～８８）实际上已经分解
In Pingtan Island, Fujian province, 60% to 70% of the minerals in the hornblende of Pingtan Island are pebbly feldspar (Pingtan pebbly feldspar). Electron probe analysis shows that the grade of the grade changes within the range of 84-88. Electron diffraction studies show that the crystal structure of the primary feldspar is primordial. However, the diffractive c and d diffuse and elongated, and the intensities of the c and d diffractions relative to the diffractions of a and b in the respective constituencies vary. Electron microscopy studies have found that the mineral crystals are widely distributed in a very fine modulation structure, the modulation of the extension of the direction of nearly parallel (010). Albite law twin is also a very common phenomenon. In addition, there are widespread small-angle grain boundaries developed by the dislocation in the crystal, which are the passages for hydrothermal fluids after the magmatic period and give rise to phyllosilicate minerals in between. The authors argue that modulation near parallel (010) is a modulation of composition, that is, the modulation of interphase domains that are rich in calcium and slightly less calcium. As the calcium-rich phase of the pebble in the Hutenlocher crystallites (An 85-88) has actually decomposed