catapleiite

catapleiite

[‚kad·ə′plī‚īt]
(mineralogy)
(Na2,Ca)ZrSi3O9·2H2O A yellow or yellowish-brown mineral crystallizing in the hexagonal system, consisting of a hydrous silicate of sodium, calcium, and zirconium, and occurring in thin tabular crystals; hardness is 6 on Mohs scale, and specific gravity is 2.8.
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Associated minerals are: microcline, aegirine, nepheline, magnesio-arfvedsonite, eudialyte, lorenzenite, lamprophyllite, catapleiite, titanite, vinogradovite, tundrite-(Ce), apatite, neptunite, tsepinite-Na, kuzmenkoite-Zn, korobitsynite.
Associated minerals are: natrolite, aegirine, microcline, catapleiite, fluorapatite, titanite, fluorite, galena, sphalerite, strontianite, annite, astrophyllite, lorenzenite, labuntsovite-Mn, kuzmenkoite-Mn, cerite-(Ce), edingtonite, ilmenite and calcite.
The new, mostly thumbnail specimens of catapleiite pseudomorphs after fluorite are quite unusual as well: pale brown, slightly rough-faced dodecahedral crystals to 1.
Associated minerals are: aegirine, anatase, ancylite-(Ce), barylite, catapleiite, cerite-(Ce), chabazite-Ca, edingtonite, fluorapatite, galena, ilmenite, microcline, natrolite, sphalerite, strontianite and vanadinite.
A few highlight will serve to demonstrate the significance of this locality for collectors of thumbnail-and-larger specimens: Lovozero has yielded bluish white analcime in sharp crystals to 13 cm; lustrous black pr ismatic arfvedsonite crystals to 10 cm; yellow belovite-(Ce) crystals "with perfect heads" to 5 cm; chiseled, glassy white, yellow or colorless catapleiite crystals, or catapleiite pseudomorphs after eudialyte crystals, to 3.
Occurrence: Associated minerals at Mont Saint-Hilaire are: aegirine, albite, ancylite-(Ce), catapleiite, fluorite, microcline, monteregianite-(Y), natrolite, nenadkevichite, rhodochrosite and serandite in pegmatites; and natrolite, titanite, calcite and pyrite in hornfels.
Associated minerals are: aegirine, albite, analcime, ancylite-(Ce), calcite, catapleiite, dawsonite, donnayite-(Y), elpidite, epididymite, eudialyte, eudidymite, fluorite, franconite, gaidonnayite, galena, genthelvite, gmelinite, gonnardite, horvathie-(Y), kupletskite, leifite, microcline, molybdenite, narsarsukite, natrolite, nenadkevichite, petersenite-(Ce), polylithionite, pyrochlore, quartz, rhodochrosite, rutile, sabinaite, serandite, siderite, sphalerite, thomasclarkite-(Y), zircon and an unidentified Na-REE-carbonate (UK91).
Associated minerals are: pyrite, rutile, a ternovite-like phase, catapleiite, rimkorolgite, bobierrite, collinsite, juonniite, strontiowhitlockite, pyrrhotite and strontian collinsite.
Associated minerals are: K-feldspar, natrolite, aegirine, sodium amphibole, pectolite, shcherbakovite, lamprophyllite, catapleiite, sazykinaite-(Y), sitinakite, lomonosovite, rhabdophane-(Ce), sphalerite and galena.
The syenite pegmatites contain calcium catapleiite, titanium-rich lavenite, lorenzenite, cesium-rich astrophyllite, kupletskite, pyrophanite, leucophanite, strontium-apatite, loparite, calcium-rich seidozerite, strontium-rich and zirconium-rich perrierite, brookite, landauite, murataite, polylithionite, brewsterite, chabazite, monazite, ancylite, bertrandite, vlasovite, hambergite.
In 1972, two of the authors (EP-H and LH) began collecting in the present Demix-Varennes quarry, which was inactive at the time, and have continued to make infrequent visits over the following 19 years during which a number of additional minerals were identified, including the rare species yofortierite, doyleite and catapleiite.