ripidolite


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ripidolite

[rə′pid·əl‚īt]
(mineralogy)
(Mg,Fe2+)9 Al6Si5O20( OH)16 A mineral of the chlorite group; consists of basic magnesium iron aluminum silicate. Also known as aphrosiderite.
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1994), ripidolite and beidellite (Sondi and Pravdic 1996), and also the iron oxide goethite (Parfitt et al.
Mineralogists of the 19th century were much more successful in the description of new layer hydrosilicates: allophane, amesite, antigorite, aspidolite, batavite, biotite /a series name/, celadonite, chamosite, chrysotile /a series name/, clinochlore, corundophyllite, cronstedtite, delessite, diabantite, ephesite, glauconite /a series name/, halloysite, kaolinite, muscovite, nacrite /a polytype/, nontronite, palygorskite, paragonite, penninite /or pennine/, phengite /a series name/, phlogopite, polylithionite, pyrophyllite, ripidolite, roscoelite, saponite, sauconite, sepiolite, serpentine, siderophyllite, stevensite, tainiolite, thuringite, vermiculite /trioctahedral and dioctahedral, distinguished in the 20th century/, volkonskoite, zinnwaldite /a series name/.
A November 1998 strike produced an abundance of pretty specimens, with sharp, gemmy, honey-brown simple dodecahedrons, to 1.5 cm, sitting singly or bunched on seam linings of deep green drusy clinochlore on greenish, schistose ripidolite rock matrixes.