The thin, wedge-terminated, transparent brown blades of Lavra do Poco Dantes childrenite form loose, delicate clusters, some with red-brown microcrystals of roscherite
, with individual childrenite crystals reaching 3 cm.
Associated minerals are: albite, potassic feldspar, roscherite
, viitaniemiite, childrenite, quartz, apatite, herderite, elbaite and montmorillonite.
Summing up their work on Sapucaia phosphates, Lindberg and Pecora (1958) listed their apatite, bermanite, childrenite, gordonite, heterosite, hureaulite, leucophosphite, lipscombite, metastrengite (= phosphosiderite), montebrasite, roscherite, saleeite, strengite, triphylite, variscite and vivianite as having been positively identified, in addition to the new species.
The silicate assemblage consists of altered albite as a host for apatite, hureaulite, goethite, gordonite, leucophosphite, phosphosiderite, rockbridgeite, saleeite, tourmaline and variscite; altered beryl as host for faheyite, moraesite, roscherite and variscite, and muscovite hosting replacements and vug fillings of apatite, bermanite, childrenite, faheyite, frondelite, montebrasite, roscherite and variscite.
Childrenite occurs at Sapucaia as pale honey-colored crystals associated with roscherite in pockets in muscovite, and with phosphosiderite and variscite in albite made vesicular as a result of triphylite leaching.
Sapucaia is the type locality for faheyite (Lindberg and Murata, 1953), where it occurs as matted and radiating groups and masses of acicular, white to bluish white and brownish white fibers coating roscherite, frondelite, variscite and quartz (Lindberg and Pecora, 1958).
Small, white crystals of fluorapatite occur with roscherite and also in quartz-variscite-monterasite veins cutting muscovite.
Associated minerals: albite, quartz, manganoan almandine, muscovite, siderite, fluorapatite, elbaite, lepidolite, beryl, montebrasite, rhodochrosite, cassiterite, manganocolumbite, uraninite, lollingite, zircon, eosphorite, moraesite, ferroan roscherite