@Article{ejm-38-305-2026,
AUTHOR = {Franz, G. and Khomenko, V. and Chornousenko, V. and Zeh, A. and Schiperski, F. and Gouzy, S. and Gernert, U. and Nissen, J.},
TITLE = {Formation of black opal in the pegmatites from Volyn (Ukraine) -- an example for interaction of silica with organic matter},
JOURNAL = {European Journal of Mineralogy},
VOLUME = {38},
YEAR = {2026},
NUMBER = {3},
PAGES = {305--324},
URL = {https://ejm.copernicus.org/articles/38/305/2026/},
DOI = {10.5194/ejm-38-305-2026}
}