... occurring crystals. Ammineite occurs as hypidiomorphic mm-sized blue crystals and also as powdery masses, associated with halite, atacamite, salammoniac and darapskite. The Mohs hardness is 1, the streak is light blue, the luster is vitreous, and the calculated density is 2.38 g/cm 3 at 100 K and 2.31 g/cm...

... on a pyroclastic breccia as colorless to white prismatic crystals up to 0.2 mm in length, in association with salammoniac and kremersite. The mineral is trigonal, space group R 3 c (no. 161) with a 15.2171(14), c 8.9323(8) Å, V 1791.3(3) Å 3 and Z = 6. The strongest six reflections in the X-ray powder...

...F ig . 10. Euhedral cubic crystals of salammoniac (AV2344a, solid fragment, SEM–SE). ...

...F igure 7. Salammoniac: gas vent 5. ( a ) Distribution of salammoniac (white mineral) on quartzofeldspathic sand suggests mineralization occurred in response to a gas moving primarily toward the right in the photo. ( b ) Crystal faces of euhedral salammoniac do not touch or are in contact along...

...Anna Garavelli; Filippo Vurro Abstract Barberiite, ammonium tetrafluoroborate, occurs as a fumarolic encrustation at Fossa crater on Vulcano, Aeolian Islands, Italy. Associated minerals are sulfur, malladrite, realgar, salammoniac, cannizzarite, galenobismutite, and bismuthinite. The mineral...

... Mineralogist 2004 Corrected average enthalpies of solution for buddingtonite (−598.1 ± 2.5 kJ/mol), tobelite (−935.0 ± 3.7 kJ/mol), and salammoniac (+11.23 ± 0.04 kJ/mol) have been determined by multiplying the original enthalpies of solution by factors equal to the correct gfw (257.2733, 377.2498...

... solution calorimetric data from this laboratory for sanidine, albite, muscovite, paragonite, halite, sylvite, salammoniac, gibbsite, and water, along with enthalpies of formation from Robie and Hemingway (1995) for the same phases, the heats of formation at 298.15 K of buddingtonite and tobelite have been...

..., salammoniac, alacránite, bonazziite and thermessaite-(NH 4 ). In addition, there are amorphous As 2 S 3 intergrowths associated with ermakovite. The mineral typically occurs as tabular or prismatic hexagonal crystals up to 200 μm with the following forms: c (001), m (010) and p (014). Spherulites and multi...

... of phases that include a variety of vanadates, phosphates, oxalates and chlorides, some containing NH 4 + . Other secondary minerals found in association with dendoraite-(NH 4 ) are antipinite, fluorite, mimetite, mottramite, relianceite-(K), rowleyite, salammoniac, struvite, vanadinite, willemite...

... of phases. Other secondary minerals associated with relianceite-(K) are antipinite, dendoraite-(NH 4 ), fluorite, mimetite, mottramite, rowleyite, salammoniac, struvite, vanadinite, willemite, wulfenite and at least one other new mineral. Crystals of relianceite-(K) are sky blue prisms up to ~0.1 mm...

...Fig. 1. Blue interrupted crusts of bojarite on an aggregate of salammoniac–halite. Dark areas are very thin films of an unidentified Mn oxide. Field of view: 7 cm wide, holotype. ...

... Mountain, Iquique Province, Tarapacá Region, Chile. Associated minerals are halite, gypsum, salammoniac and clay minerals. Ammoniotinsleyite occurs as pink to pale violet globular aggregates up to 3 mm across with individual single crystals ~10–15 μm. The mineral is brittle. Its Mohs hardness is 4. D meas...