POROSITY OF COPPER- AND ZINC-RICH NATURAL HEULANDITE. - Tsitsishvili, V. G.; Dolaberidze, N. M.; Mirdzveli, N. A.; Nijaradze, M. O.; Amiridze, Z. S.; Khutsishvili, B. T. (Chemistry, Physics & Technology of Surface / Khimiya, Fizyka ta Tekhnologiya Poverhni, 2025)