These include exceptional specimens of fluorapatite, ferberite, arsenopyrite, siderite, quartz and numerous other species such as : chalcopyrite, sphalerite, dolomite, calcite, mica, tourmaline, fluorite and topaz.
22.
Fluorapatite ( or fluoroapatite ) is more resistant to acid attack than is hydroxyapatite; in the mid-20th century, it was discovered that communities whose water supply naturally contained fluorine had lower rates of dental caries.
23.
The irritant gases are sulfur dioxide, ammonia, nitrogen dioxide, chlorine, phosgene, and fluorine and its compounds, which include luroine and hydrofluoric acid, fluorspar, fluorapatite, cryolite, and organic fluorine compounds.
24.
She has designed and developed recyclable heterogeneous catalysts, copper-exchanged fluorapatite and tert-butoxyapatite by incorporating basic species F-/ tBuO-in apatite for N-arylation of imidazoles with chloroarenes and fluoroarenes for the first time.
25.
The first description of bityite was by Lacroix in 1908 . and further occurrences have been found from the Middle albitic plagioclase, muscovite and tourmaline; the pseudomorphs filled with bityite have been found to contain amounts of fluorite, bertrandite, fluorapatite, quartz and beryl.
26.
The following minerals are also found in the veins of cleusonite; quartz, chlorite, calcite, albite, microcline, tourmaline, fluorapatite, zircon, ilmenite, hematite, titanite, pyrite, chalcopyrite, tennantite, rutile, crichtonite, monazite-( Ce ), and native gold.
27.
At the same locality it was found in alkaline pegmatite veins associated with clinobarylite, natrolite, aegirine, microcline, catapleiite, fluorapatite, titanite, fluorite, galena, sphalerite, annite, astrophyllite, lorenzenite, labuntsovite-Mn, kuzmenkoite-Mn, cerite-( Ce ), edingtonite, ilmenite and calcite.
28.
It also occurs at Yukspor Mountain, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, in an aegerine-natrolite-microcline vein in foyaite, associated with aegirine, anatase, ancylite-( Ce ), barylite, catapleiite, cerite-( Ce ), cerite-( La ), chabazite-( Ca ), edingtonite, fluorapatite, galena, ilmenite, microcline, natrolite, sphalerite and vanadinite.
29.
"' Apatite "'is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite, with high concentrations of PO 4 ) 6 ( OH, F, Cl ) 2, and the crystal unit cell formulae of the individual minerals are written as Ca 10 ( PO 4 ) 6 ( OH ) 2, Ca 10 ( PO 4 ) 6 ( F ) 2 and Ca 10 ( PO 4 ) 6 ( Cl ) 2.
