...Sasha Herwig; Frank C. Hawthorne Abstract The crystal structures of brandtite [Ca 2 (Mn,Mg)(AsO 4 ) 2 (H 2 O) 2 , monoclinic, a 5.877(1), b 12.957(2), c 5.675(1) Å, β 108.00(3)°, V 411.0 Å 3 , space group P 2 1 / c , Z = 2], collinsite [Ca 2 (Mg,Fe)(PO 4 ) 2 (H 2 O) 2 , triclinic, a 5.729(1), b...

...Ruslan P. Liferovich; Yakov A. Pakhomovsky; Alla N. Bogdanova; Elena G. Balaganskaya; Kauko V.O. Laajoki; Seppo Gehör; Nikita V. Chukanov Abstract Several generations of collinsite were formed during the hydrothermal alteration of phoscorite and dolomite carbonatite in the Kovdor alkaline...

...Olga V. Yakubovich; Werner Massa; Ruslan P. Liferovich; Polina G. Gavrilenko; Alla N. Bogdanova; Pekka Tuisku Abstract Hillite (хиллит in Russian ), ideally Ca 2 (Zn,Mg)[PO 4 ] 2 ·2H 2 O, is a new zinc-dominant analogue of collinsite, isostructural with fairfieldite. It occurs in unmetamorphosed...

... can be considered a combination of the collinsite and messelite structures alternating along [001], thus representing a new structure type for minerals with kröhnkite-type chains. The discovery of dondoellite raises the question as to whether polymorphs of fairfieldite, Ca 2 Mn 2+ (PO 4 ) 2 ·2H 2 O...

..., pyrochlore, several generations of magnetite, pyrite, rutile, a ternovite-like phase, catapleiite, bobierrite, rimkorolgite, juonniite, strontiowhitlockite, collinsite (including a Sr-rich variety) and chlorite. Gladiusite occurs as acicular aggregates and as free-standing radial clusters (<2 mm...

..., and the inner region is comprised of orange-brown lithiophilite. The core of the nodule consists of an assemblage of altered lithiophilite, locally stained red (hematite?), colorless lithiophosphate and dark brown-black clots of ercitite on collinsite, fairfieldite, whitlockite and two unidentified phosphates...

... a strong bireflectance. Reflectance values R ε and R ω are given for λ over the interval 420–720 nm. Henrymeyerite is associated with dolomite, fluorapatite, tetra-ferriphlogopite, rimkorolgite, catapleiite, collinsite, and pyrite. The composition of henrymeyerite, as determined by electron microprobe...