ganophyllite

ganophyllite

[‚gan·ə′fi‚līt]
(mineralogy)
(Na,K)(Mn,Fe,Al)5(Si,Al)6O15-(OH)5·2H2O A brown, prismatic crystalline or foliated mineral composed of a hydrous silicate of manganese and aluminum.
References in periodicals archive ?
This deposit has also produced exceptional specimens of tinzenite, sursassite and ganophyllite.
The "lean ore" is sometimes crossed by veins up to 80 cm wide and up to several tens of meters in length; this kind of vein yielded carpholite, native copper, sulfides, and probably the world's best specimens of tinzenite, sursassite and ganophyllite.
The Molinello workings were mainly underground; they yielded fine copper, gamagarite, ganophyllite, rhodochrosite, rhodonite, tangeite and tinzenite specimens.
The Val Graveglia manganese mines have produced some rare and uncommon species (bementite, ganophyllite, sarkinite, sussexite, tephroite etc.
Some attractive specimens from the Molinello mine show crystals up to 2 cm, associated with quartz, ganophyllite, kutnahorite and, in places, hematite or sulfides.
They are associated with calcite, ganophyllite and barite.
It is associated with quartz, calcite, copper, ganophyllite and other sulfides.
Spectacular specimens were found during the late 1960's at the Gambatesa mine in a manganoan calcite vein, in association with chalcocite and ganophyllite.
Interesting specimens showing brown crystals of a calcium and magnesium pyroxene (manganese and iron-bearing) in association with ganophyllite and calcite came to light in the middle 1980's at the Molinello mine, and were reported as manganoan diopside (Borgo and Palenzona, 1988).
Associated minerals are: celsian, barian orthoclase, aegirine, manganoan grossular, native copper, strontiopiemontite, eggletonite and ganophyllite.
Relationship to other species: It is the calcium-dominant analogue of ganophyllite, [(K,Na).
2000) Tamaite, the Ca-analogue of ganophyllite, from the Shiromaru mine, Okutama, Tokyo, Japan.