BRIZZIITE, NASBO3, A NEW MINERAL FROM THE CETINE MINE (TUSCANY, ITALY) - DESCRIPTION AND CRYSTAL-STRUCTURE

被引:0
|
作者
OLMI, F
SABELLI, C
机构
关键词
BRIZZIITE; NEW MINERAL; SODIUM ANTIMONATE; CRYSTAL STRUCTURE; CETINE MINE (ITALY);
D O I
暂无
中图分类号
P57 [矿物学];
学科分类号
070901 ;
摘要
Brizziite is a new sodium antimonate mineral from the Cetine mine, Tuscany, Italy. It occurs as dense aggregates of platy {001} hexagonal crystals. Associated minerals are stibiconite and mopungite. The crystals, which are polysynthetically twinned, are colourless and transparent, with pearly lustre. Electron microprobe analyses give Na2O 15.98 and Sb2O5 83.28 wt.%, corresponding to the formula NaSbO3. Optically, brizziite is uniaxial (-) with epsilon = 1.631(1), omega = 1.84, birefringence 0.21(1); VHN15 microhardness 57; D-meas = 4.8(2) g/cm(3); D-calc = 4.95 g/cm(3). The unit cell is rhombohedral (hexagonal) a = 5.301(1), c = 15.932(4) Angstrom, space group R ($) over bar 3 and Z = 6. The strongest lines in the X-ray Gandolfi pattern are (d(obs), I, hkl)5.30(53)(003), 3.00(55)(104), 2.650(67)(006,110), 2.365(69)(113), 1.874(100)(116), 1.471(69)(119,303). The IR spectrum is given also. The mineral is named for the mineral collector G. Brizzi (1936-1992). The crystal structure was refined to an R index of 0.025, using a set of 334 observed (6 sigma) reflections (R = 0.043 for an 385 collected reflections). The structure consists of the ilmenite-type octahedral arrangement; layers of distorted edge sharing Na octahedra alternate with layers of edge-sharing Sb+5 octahedra along [001]. The layers are connected to one another by octahedral face-sharing.
引用
收藏
页码:667 / 672
页数:6
相关论文
共 50 条
  • [1] STRUCTURE REFINEMENT OF ELPASOLITE FROM CETINE MINE, TUSCANY, ITALY
    SABELLI, C
    [J]. NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE, 1987, (11): : 481 - 487
  • [2] Ottensite, brizziite and mopungite from Pereta mine (Tuscany, Italy): new occurrences and crystal structure refinement of mopungite
    Bittarello, Erica
    Camara, Fernando
    Ciriotti, Marco E.
    Marengo, Alessandra
    [J]. MINERALOGY AND PETROLOGY, 2015, 109 (04) : 431 - 442
  • [3] CETINEITE, A NEW ANTIMONY OXIDE-SULFIDE MINERAL FROM CETINE MINE, TUSCANY, ITALY
    SABELLI, C
    VEZZALINI, G
    [J]. NEUES JAHRBUCH FUR MINERALOGIE-MONATSHEFTE, 1987, (09): : 419 - 425
  • [4] Ottensite, brizziite and mopungite from Pereta mine (Tuscany, Italy): new occurrences and crystal structure refinement of mopungite
    Erica Bittarello
    Fernando Cámara
    Marco E. Ciriotti
    Alessandra Marengo
    [J]. Mineralogy and Petrology, 2015, 109 : 431 - 442
  • [5] THE CRYSTAL-STRUCTURE AND IONIC-CONDUCTIVITY OF THE ILMENITE POLYMORPH OF NASBO3
    WANG, B
    CHEN, SC
    GREENBLATT, M
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 1994, 108 (01) : 184 - 188
  • [6] ROSENBERGITE, ALF[F-0.5(H2O)(0.5)](4).H2O, A NEW MINERAL FROM THE CETINE MINE (TUSCANY, ITALY) - DESCRIPTION AND CRYSTAL-STRUCTURE
    OLMI, F
    SABELLI, C
    TROSTIFERRONI, R
    [J]. EUROPEAN JOURNAL OF MINERALOGY, 1993, 5 (06) : 1167 - 1173
  • [7] CRYSTAL-STRUCTURE OF TSUMCORITE, A NEW MINERAL FROM TSUMEB MINE, SW AFRICA
    TILLMANNS, E
    GEBERT, W
    [J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1973, 29 (DEC15): : 2789 - 2794
  • [8] Rosiaite, PbSb2O6, a new mineral from the Cetine mine, Siena, Italy
    Basso, R
    Lucchetti, G
    Zefiro, L
    Palenzona, A
    [J]. EUROPEAN JOURNAL OF MINERALOGY, 1996, 8 (03) : 487 - 492
  • [9] PITIGLIANOITE, A NEW FELDSPATHOID FROM SOUTHERN TUSCANY, ITALY - CHEMICAL-COMPOSITION AND CRYSTAL-STRUCTURE
    MERLINO, S
    MELLINI, M
    BONACCORSI, E
    PASERO, M
    LEONI, L
    ORLANDI, P
    [J]. AMERICAN MINERALOGIST, 1991, 76 (11-12) : 2003 - 2008
  • [10] ARTROEITE, PBALF3(OH)(2), A NEW MINERAL FROM THE GRAND REEF MINE, GRAHAM COUNTY, ARIZONA - DESCRIPTION AND CRYSTAL-STRUCTURE
    KAMPF, AR
    FOORD, EE
    [J]. AMERICAN MINERALOGIST, 1995, 80 (1-2) : 179 - 183