Abstract The new mineral argentopolybasite, ideally Ag 16 Sb 2 S 11 , was found at the Kremnica Au–Ag epithermal deposit, Žiar nad Hronom Co., Banská Bystrica Region, Slovakia (type locality), Šibeničný vrch near Nová Baňa, Žarnovica (cotype locality) and Arykevaam Anadyr’ District, Chukotka Autonomous Okrug, Russian Federation locality). At deposit argentopolybasite as discrete, well-developed...

Abstract. Re-investigation of the type material beraunite from Hrbek Mine, Svatá Dobrotivá, Czech Republic, proved identity and eleonorite. Based on this study, mineral eleonorite was discredited, ideal formula redefined Fe2+Fe53+(PO4)4(OH)5 ⋅ 6H2O to Fe63+(PO4)4O(OH)4 6H2O. Beraunite Mine usually forms prismatic crystals flattened {100}; elongated along b axis, striated {100} || b, up 0.2 × 0....

Coexisting orthoalnphiboles (high Al-Na gedrites and low Al-Na anthophyllites) from the Post Pond Volcanics, Vermont, display a variety of textures that are interpreted to be equilibrium growth textures. These textures include: (l) discrete grains; (2) bladed intergrowths; (3) patchy intergrowths; (4) overgrofihs; and (5) lamellar intergrowths with lamellae parallel to (120). Coexisting orthoam...

Abstract The new mineral shinarumpite (IMA2021-105), [Co(H 2 O) 6 ][(UO )(SO 4 ) (H O)]⋅4H O, was found in the Scenic mine on Fry Mesa, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary phase granular quartz matrix association with gypsum, deliensite, Co-rich rietveldite, scenicite, shumwayite and sulfur. Shinarumpite crystals are transparent, yellow, blades or p...

exact petrography and mineral chemistry investigations of pristine and altered rocks of the post-eocene panj-kuh pluton show thatsubsequent to emplacement and crystallization, rocks were subjected to two secondary composition equivalents, sodic-calcic andpotassic alterations, respectively. fresh rocks have syenitic composition and contain plagioclase (labradorite), k-feldspar, magmaticdiopside,...

Compared to the Earth, its Moon is strongly depleted in volatiles, and its interior is generally treated as anhydrous. The internal volatile content of the Moon remains a critical control on its petrogenesis, and can be re-assessed in light of current interest in the Moon. One tool in this assessment is chemical (and isotopic) analysis of minerals that could contain volatile elements. One volat...

Introduction: Ti-bearing clinopyroxene, known as fassaite, is a major phase in the interiors of coarse-grained, Ca-, Al-rich refractory inclusions (CAIs). Electron microprobe (EMP) analyses of such pyroxene yield low cation sums when normalized to six oxygen anions if it is assumed that all Ti is present as Ti 4+. Instead, we can assume that there is one Ca cation [1] and two tetrahedral cation...

Introduction: Amphibole has been reported from a few groups of Martian meteorites (basaltic, lherzolitic and dunitic groups) [1-4]. They are always present within a magmatic inclusion trapped in pyroxene and olivine in spite of the large difference of the host petrology. Their mineral compositions are almost identical to one another and are kaersutitic. So far, only observations by optical micr...

Exact petrography and mineral chemistry investigations of pristine and altered rocks of the post-Eocene Panj-Kuh pluton show thatsubsequent to emplacement and crystallization, rocks were subjected to two secondary composition equivalents, sodic-calcic andpotassic alterations, respectively. Fresh rocks have syenitic composition and contain plagioclase (labradorite), K-feldspar, magmaticdiopside,...