**1. Introduction**

Allanite ([Ca, REE]2[Fe, Al]3Si3O12[OH]) is a common accessory mineral from the epidote group which occurs in intermediate granitic rocks (granodiorites, tonalites, and diorites) and their dyke equivalents (microgranodiorites and microdiorites) (e.g., [1–3]). Although its modal abundance in these rocks is low, allanite is a major residence site for LREE. It is related to epidote by coupled substitution:

$$\text{REE}^{3\*} + \text{Fe}^{2\*} = \text{Ca}^{2\*} + \text{Fe}^{3\*} \tag{1}$$

and to clinozoisite by

$$\text{REE}^{3\*} + \text{Fe}^{2\*} = \text{Ca}^{2\*} + \text{Al}^{3\*}.\tag{2}$$

This manuscript concentrates on mineralogy and chemical composition of allanite which occurs as a relatively rare accessory mineral in some intermediate granitic rocks of the Moldanubian batholith of the Bohemian Massif. The Moldanubian batholith represents a large plutonic body in the Bohemian Massif composed of biotite granodiorites, granites, and two-mica granites together with some younger dykes (aplites, pegmatites, felsic granites, and microgranodiorites to microdiorites) [4, 5].
