... repository for nuclear waste. Three members of the uranyl sulfate zippeite group, natrozippeite, cobaltzippeite, and zinczippeite, were synthesized and characterized prior to determination of their standard state enthalpies of formation from binary oxides and from elements using high-temperature drop...

...Figure 1. Lozenge-shaped crystals of bobfinchite on black asphaltite with bladed natrozippeite and gypsum. Horizontal field of view is 0.5 mm. (Color online.) ...

...Fig. 1. Chinleite-(Nd) with natrozippeite and gypsum on asphaltite; FOV 0.43 mm across; cotype specimen #76253. ...

... as a secondary phase on granular quartz matrix in association with various combinations of deliensite, gypsum, natrozippeite, rietveldite and shumwayite. Scenicite crystals are transparent, light green yellow, poorly formed blades or prisms, up to 0.1 mm in length. The mineral has white streak and vitreous...

...Figure 12. ( a ) Comparison of Raman spectra collected for natrozippeite ( b ) for several localities. Horizontal field of view for all sample photographs is 450 µm. ...

... with chinleite-(Y), gypsum, goethite, natrojarosite, natrozippeite, plášilite, shumwayite (Blue Lizard) and wetherillite (Markey). The mineral is pale greenish yellow with a white streak and fluoresces bright greenish white under a 405 nm laser. Crystals are transparent with a vitreous lustre. It is brittle...

... with ammoniozippeite, gypsum, jarosite and natrozippeite. The mineral forms pale yellow to greenish-yellow prisms, up to ~0.3 mm long, with pale-yellow streak and bright yellow–green fluorescence. Crystals are transparent and have vitreous lustre. The mineral is brittle, with Mohs hardness of 2½, stepped fracture...

... Juan County, Utah, USA. It occurs with natrozippeite, brochantite, devilline, posnjakite, johannite, gypsum, bobcookite, pickeringite, pentahydrite and the NH 4 -analogue of zippeite: ammoniozippeite. Redcanyonite occurs as radial aggregates of red–orange needles and blades individually reaching up...

..., gypsum and natrozippeite. The mineral is pale yellowish-green with white streak and fluoresces bright bluish white under a 405 nm laser. Crystals are transparent and have vitreous to pearly lustre. It is brittle, with Mohs hardness 1½ to 2, irregular fracture and three cleavages: perfect on {001}; good...

...Fig. 2. Pearlescent masses of leószilárdite coat andersonite, with yellow natrozippeite and probable white spherical hydromagnesite. Horizontal field of view is ∼1.9 mm. Travis Olds specimen and photo. ...

... Burro mine Colorado USA In 1976, Frondel et al . examined the minerals of the zippeite group. They redefined the K-dominant phase as zippeite and defined sodium-zippeite, cobalt-zippeite, nickel-zippeite, magnesium-zippeite, and zinc-zippeite (now named natrozippeite, cobaltzippeite...