Albertiniite, Fe2+(SO3)center dot 3H(2)O, a new sulfite mineral species from the Monte Falo Pb-Zn mine, Coiromonte, Armeno Municipality, Verbano Cusio Ossola Province, Piedmont, Italy

作者：Vignola P^*; Gatta G D; Rotiroti N; Gentile P; Hatert F; Baijot M; Bersani D; Risplendente A; Pavese A

来源：Mineralogical Magazine, 2016, 80(6): 985-994.

DOI：10.1180/minmag.2016.080.033

• albertiniite
• Fe sulfite trihydrate
• Monte Falo Pb-Zn mine
• Verbania province
• Italy
• new mineral

Albertiniite, Fe2+(SO3)center dot 3H(2)O, is a new Fe2+ sulfite trihydrate, related chemically to gravegliaite. It occurs at the Monte Falo Pb-Zn mine near Coiromonte, in the Armeno Municipality, Verbano-Cusio-Ossola Province, Italy. It is an intermediate product of oxidation between iron sulfides and sulfates, forming monoclinic, colourless to pale yellow, transparent crystals with a vitreous lustre. The mineral occurs associated with stolzite, pyromorphite, hinsdalite, plumbogummite, gibbsite, scheelite and jarosite on brittle fractures of quartz veins or chlorite-schist. Albertiniite is optically biaxial (+) with 2V((meas))approximate to 40 degrees and 2V((calc)) = 66 degrees. The measured refractive indices, using sodium light (589 nm) are: alpha = 1.612(2)degrees, beta = 1.618(2)degrees and gamma= 1.632(2)degrees. The optical axis plane is parallel to the perfect {010} cleavage plane. It is non-fluorescent under shortwave (254 nm) or longwave (366 nm) ultraviolet light. The calculated density is 2.469 g cm(-3) (from the crystal-structure refinement), or 2.458 g cm(-3) (from the chemical analysis and the single-crystal unit-cell parameters). The empirical formula is (average of 16 spots and based on 3 anhydrous oxygen apfu) (Fe0.7742+Mn0.2822+Ca0.001Mg0.001Na0.003)(Sigma 1.061)(S0.971O3)center dot 2.84H(2)O, with the H2Ocontent calculated by difference to 100 wt.%. Albertiniite is monoclinic, with space group P2(1)/n. Its unit-cell parameters are: a = 6.633(1), b = 8.831(1), c = 8.773(1) angstrom, beta = 96.106(8)degrees and V= 511.0(1) angstrom(3), with Z = 4. The eight strongestmeasured lines in the powder X-ray diffraction pattern are [d in angstrom, (I/I-0), (hkl)]: 4.072 (100) ((1) over bar 11), 3.539 (93) ((1) over bar 12), 5.533 (27) ((1) over tilde 01), 6.167 (14) (011), 2.830 (14) (211), 4.998 (14) (101), 4.353 (12) (111) and 3.897 (12) (012). The mineral, which has been approved by the CNMNC, number IMA2015-004, is named albertiniite in honour of Claudio Albertini, an Italianmineral collector and expert in the systematic mineralogy of the Alps and pegmatites.

• 出版日期2016-10