pachnolite

pachnolite

[′pak·nə‚līt]
(mineralogy)
NaCaAlF6·H2O Colorless to white mineral composed of hydrous sodium calcium aluminum fluoride, occurring in monoclinic crystals.
References in periodicals archive ?
Minerals in the pegmatite are: quartz, microcline, muscovite, albite, amblygonite, "apatite," beryl, uraninite, elbaite, members of the tantalite group, secondary uranium minerals, triphylite, triplite, purpurite, rockbridgeite, tavorite, barbosalite, hureaulite, eosphorite, phosphosiderite, carlhintzeite, colquirite, pachnolite, ralstonite and fluellite.
Associated minerals are: cryolite, cryolithionite, pachnolite, weberite, thomsenolite, prosopite, ralstonite, and fluorite.
Minerals identified in the pipe are: cryolite, cryolithionite, elpasolite, pachnolite, prosopite, ralstonite, thomsenolite, weberite and a new mineral with the composition [Na.
The Zapot pegmatite represents the third known occurrence of the alumino-fluoride minerals cryolite, elpasolite, pachnolite, prosopite, and ralstonite in North America.
Minerals in the younger, secondary stage include: fluorite, pachnolite, prosopite, ralstonite, thomsenolite, and weberite.
Pachnolite occurs as fine-grained, soft, snow white masses to 1 cm associated with other late-stage alumino-fluorides.
1946) On the crystallography of thomsenolite and pachnolite.
The pocket contained many well-formed microcrystals of chiolite, elpasolite, thomsenolite, pachnolite and ralstonite.
The paragenetic sequence of secondary aluminum fluorides observed in the pocket is: cryolite to elpasolite and chiolite, followed by thomsenolite, pachnolite and finally ralstonite.
The Morefield elpasolite is associated with prosopite, cryolite, chiolite, thomsenolite, pachnolite and ralstonite.
Thomsenolite and pachnolite are dimorphous forms which generally occur together in cryolite solution cavities.
Pachnolite is biaxial positive with 2V = 76[degrees], and thomsenolite is biaxial negative with 2V = 50[degrees].