Mineral name, if the authors agree on its release prior to the full description appearing in press Chemical formula Type locality Full authorship of proposal E-mail address of corresponding author Relationship to other minerals Crystal system, Space group; Structure determined, yes or no Unit-cell parameters Strongest lines in the powder X-ray diffraction pattern Type specimen repository and specimen number Citation details for the mineral prior to publication of full description Citation details concern the fact that this information will be published in the Mineralogical Magazine on a routine basis, as well as being added month by month to the Commission's web site. NO OTHER INFORMATION WILL BE RELEASED BY THE COMMISSION NEW MINERAL PROPOSALS APPROVED IN APRIL 2020 IMA No. 2019-128 Ammoniotinsleyite (NH4)Al2(PO4)2(OH)⋅2H2O In a guano deposit on the lower part of the steep southern slope of Pabellón de Pica Mountain, near Chanabaya village, Iquique Province, Tarapacá Region, Chile (20°54′55″S, 70°08′25″W) Nikita V. Chukanov*, Gerhard Möhn, Igor V. Pekov, Natalia V. Zubkova, Dmitry A. Ksenofontov, Dmitry I. Belakovskiy, Svetlana A. Vozchikova, Sergey N. Britvin and Joy Desor *E-mail: nikchukanov@yandex.ru The NH4-dominant analogue of tinsleyite Monoclinic: P21/n; structure determined a = 9.5871(1), b = 9.6089(1), c = 9.6467(1) Å, β = 103.446(1)° 7.50(23), 6.71(79), 5.947(100), 4.676(36), 3.032(28), 2.958(25), 2.846(22), 2.635(29) Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5510/1 How to cite: CNMNC Newsletter No. 55; Mineralogical Magazine, 84, https://doi.org/10.1180/mgm.2020.39 IMA No. 2019-130 Pokhodyashinite Cu2Tl3Sb5As2S13 Vorontsovskoe gold deposit, ca. 13 km S of the city of Krasnotur'insk, Sverdlovskaya Oblast’, Northern Urals, Russia (59°38′52″N, 60°12′55″E) Anatoly V. Kasatkin*, Emil Makovicky, Jakub Plášil, Radek Škoda, Atali A. Agakhanov and Mikhail V. Tsyganko *E-mail: anatoly.kasatkin@gmail.com New struct...

Newsletter 55

10.1180/mgm.2020.39