Secondary Zn-bearing phosphate minerals associated with alteration of phosphophyllite at Hagendorf-Süd, Bavaria

Jahnsite-(CaMnZn) from the Hagendorf-Süd pegmatite, Oberpfalz, Bavaria, and structural flexibility of jahnsite-group minerals

“…The beam was defocused to 5 μm. The analytical results were reported by Grey et al (2018). The analyses are reproduced in Table 2 The low-Zn compositional zones correspond to jahnsite-(CaMnMn), Grice et al (1990).…”

“…A structural basis for orthogonal orientation of jahnsite crystals growing on phosphophyllite has been given by Grey et al (2018). The underside of thin crusts comprised orthogonal orientations of smaller rectangular laths with sub-10 μm dimensions (figure 5 in Grey et al, 2018). Subparallel blades were also observed occasionally.…”

“…By combining numerous crusts a sample mass of 5 mg was accumulated for the Mössbauer experiment. Preliminary Mössbauer results were reported by Grey et al (2018). We have subsequently re-run the spectrum using a new source to obtain better counting statistics.…”

“…A discussion of the secondary Zn-bearing phosphate minerals associated with alteration of phosphophyllite at Hagendorf-Süd is given by Grey et al . (2018).

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“…In Mücke's (1981) paragenesis classification of Hagendorf Süd minerals, jahnsite-(CaMnZn) is located in table I (rockbridge-free subparageneses) under paragenesis IC (decomposition of phosphophyllite). A discussion of the secondary Zn-bearing phosphate minerals associated with alteration of phosphophyllite at Hagendorf-Süd is given by Grey et al (2018).…”