...Horace Winchell Abstract Hurlbut (1950) discussed the evidence that the childrenite-eosphorite series Mn 1– x Fe x Al(PO 4 )(OH) 2 (H 2 O) is indeed a continuous isomorphous series, citing examples with x = 0.04, 0.14, 0.16, 0.23, 0.32, 0.33, 0.39, 0.47, 0.85, and 0.91, and giving in summary...

...W. H. Barnes; Violet C. Shore Abstract On the basis of an exhaustive optical study of the childrenite-eosphorite series, Professor C. S. Hurlbut ( Am. Mineral. , 35 , 793–805, 1950) concludes that these minerals should be classified in the monoclinic system. Previous morphological ( Dana's Textbook...

...Cornelius S. Hurlbut, Jr. Abstract An optical study of the childrenite-eosphorite series shows twinning in all well-crystallized members indicating monoclinic symmetry. In singly terminated crystals twinning is on {100}; in doubly terminated crystals twinning is on both {100} and {001...

...William H. Barnes Abstract The unit cell constants and the space group of childrenite, AlPO 4 · Fe(OH) 2 · 2H 2 O, have been determined by the Buerger precession method with the following results: a = 10.38 Å, b = 13.36 Å c = 6.911 Å a:b:c =0.7766:1:0.5173; Z = 8; calculated density = 3.186 g./cc...

... quartz, siderite, scorzalite, goyazite, palermoite, bjarebyite, childrenite, arrojadite, and many very late products. Foggite , Ca(H 2 O)Al(OH) 2 [P0 4 ], a 9.270(2)Å, b 21.324(7)Å, c 5.190(2)Å, A 2 1 22, Z = 8, specific gravity 2.78, hardness 4, cleavages {010} perfect and {100} good, occurs...

... (apatite manganifère, monazite) dans l’aplite THM est contemporaine d’un événement thermique à environ 302 Ma suivant la mise en place du granite post-kinématique de Flossenbürg. Les séquences 1a et 1b, contenant les solutions solides lazulite et childrenite–éosphorite et la gordonite, sont...

... of triphylite by ferrisicklerite and heterosite; and (3) hydrothermal, with secondary growth of alluaudite at the expense of heterosite and wardite from montebrasite caused by Na-metasomatism. A Ca-rich influx under oxidizing conditions produced childrenite–eosphorite–ernstite, jahnsite-(CaMnFe...

... granitic pegmatite, Minas Gerais, Brazil. It occurs as tiny dodecahedral {1 1 0} crystals, deposited on moraesite fibres. Associated primary minerals are albite, montebrasite, Li-bearing micas, cassiterite, elbaite and quartz, while the secondary phosphate association contains fluorapatite, childrenite...

... inclusions show a main mineralogy composed of muscovite, α-quartz, mogánite, dickite, and minor feldspars which demonstrate, in combination with the observation of dawsonite, nahcolite, jeremejevite, and childrenite daughter minerals, a CO 2 -, H 2 O-, B 2 O 3 -, and P 3 O 4 -enriched peraluminous boro...

... origin for the graphite. The Belvís pluton is a reversely zoned massif composed by four highly fractionated granite units, showing a varied accessory phosphate phases: U-rich monazite, U-rich xenotime, U-rich fluorapatite, and late eosphorite-childrenite. The strong peraluminous character of the granites...

... and triplite, and altered the granites, aplites and pegmatites, replacing some of the phosphate minerals and feldspars and depositing goyazite, montebrasite and childrenite–eosphorite. The interaction of the residual hydrothermal fluids with those from the surrounding metamorphic rocks during later alteration...

..., quartz, albite, beryl, amblygonite-montebrasite, childrenite-eosphorite and apatite, and crystallized as one of the latest minerals during pocket formation. It is off-white to pale yellow or light tan, translucent with a white streak and a vitreous lustre, and shows light blue to pale yellow...