...Georgia Pe-Piper; Lila M. Dolansky Abstract Hydrated alumino-phosphate-sulfate (APS) minerals of the woodhouseite and crandallite series are found as microcrystalline aggregates replacing volcanic glass and apatite and filling pores in sandstones of the fluvial Lower Cretaceous Chaswood Formation...

..., pyrite, and rutile. Some topaz grains from the UHP belt contain abundant inclusions of oriented kyanite, whereas those from the HP belt are partially replaced by woodhouseite [CaAl 3 (PO 4 )(SO 4 )(OH) 6 ]. Most topaz crystals contain 9.5 to 13.5 wt% F [0.92–1.30 atoms per formula unit (apfu...

...Dwight M. Lemmon Abstract Woodhouseite is a new sulfate-phosphate member of the beudantite group. It is found in small quantities in quartz veins that adjoin and penetrate the commercial andalusite deposits 1 located on the west slope of White Mountain in the Northern Inyo Range, Mono County...

... 0.5 ☐ 0.5 Al 3 (SO 4 ) 2 (OH) 6 , is associated with alunite, jarosite, baite, quartz, and pyrite in veins. Huangite, Ca 0.5 ☐ 0.5 Al 3 (SO 4 ) 2 (OH) 6 , coexists with kaolinite, pyrite, and woodhouseite in altered wall rocks. The new alunite group minerals have space group R 3 m , Z = 6...

...-dominant APS minerals that fall within the woodhouseite and svanbergite compositional fields; and a second REE- and phosphate-dominant group closer to florencite in composition. All phases nevertheless display extensive solid solution among end-members in the broader APS clan and show extensive...

...F ig . 9. SEM photomicrograph of sample MV00-24 from quartz-dickite-kaolinite selvage near margin of eastern alunite zone (sample location 15 on Figs. 3 –5 ). EDS chemical analysis is consistent with fine-grained crystals of woodhouseite (W, CaAl 3 (PO 4 )(SO 4 )(OH) 6 ) occurring between...

... substituting for REE and P respectively (woodhouseite-type substitution). Another possible substitution is Th 4+ + Ca 2+ ⇌2 REE 3+ (florencite-type). A deficiency of cations in the X site can be explained by either the presence of carbon, undetectable by microprobe, in the crystal lattice or a lack of X -site...

... symmetrically around the ore zone, with an ore-bearing core characterized by a quartz-chlorite ± sericite assemblage. The core is enveloped by a quartz-pyrophyllite ± topaz ± fluorite ± zunyite ± woodhouseite assemblage with local bornite-bearing ore zones. This zone, in turn, is enveloped by a pyritic quartz...

...-kaolinite stage, (4) kaolinite-cristobalite stage, and (5) kaolinite stage. Stages (4) and (5) are characterized by the presence of alunite-, woodhouseite-, and crandallite-group minerals and some minerals of the aluminite-alunogen group. Within the deposits, gradual changes (progressive vs. regressive...

... are predominately members of the alunite-natroalunite solid-solution series with subordinate jarosite (potassium-iron sulfate) and minor amounts of woodhouseite [CaAl 3 (PO 4 )(SO 4 )(OH) 6 ]. Three distinct modes of occurrence were recognized for the sulfate minerals: (1) thin beds, 1 to 8 cm thick and laterally...