X

Interested in the Harquail School of Earth Sciences?

Fill out this form and we will contact you with details about our programs!

Learn More!
?
Comment
Home  /  Comment

LALONDEITE, A NEW HYDRATED Na-Ca FLUOROSILICATE SPECIES FROM MONT SAINT-HILAIRE, QUEBEC: DESCRIPTION AND CRYSTAL STRUCTURE

Publication Type:

Journal Article

Source:

Canadian MineralogistCanadian MineralogistCanadian Mineralogist, Volume 47, Number 1, p.181-191 (2009)

ISBN:

0008-4476

Accession Number:

WOS:000265004800015

Keywords:

crystal structure, gyrolite, lalondeite, layered fluorosilicate hydrate, minerals, Mont Saint-Hilaire, new mineral species, phase, quebec, reyerite-gyrolite group, scattering factors, truscottite

Abstract:

Lalondeite, ideally (Na, Ca)(6)(Ca, Na)(3)Si(16)O(38)(F,OH)(2)center dot 3H(2)O, is a new mineral species from the Poudrette quarry, Mont Saint-Hilaire, Quebec. The mineral forms elongate aggregates of densely packed, randomly oriented crystals. Individual crystals are colorless, subhedral, roundish plates, typically measuring <0.5 mm in thickness and up to three mm across, dominated by the pinacoid {001}. Associated minerals include microcline, clinoamphibole and narsarssukite. The mineral has a vitreous luster, and is transparent with a white streak. It shows no fluorescence under long-wave ultraviolet radiation, a medium to strong violet-blue fluorescence under medium-wave radiation, and a weak violet to violet-blue fluorescence under short-wave radiation. It has a Mohs hardness of similar to 3, an inelastic, perfect {001} cleavage, and is brittle with a splintery fracture; its density is 2.50(1) (measured) and 2.51 g/cm(3) (calculated). Lalondeite is non-pleochroic, biaxial negative, with alpha 1.522(1), beta 1.528(1), gamma 1.529(1) (for lambda = 589 nm), 2V(meas) = 48(1)degrees, 2V(calc) = 44(1)degrees; no dispersion was noted. The optical orientation is X approximate to c. The average result of eighteen analyses of three crystals made using combined energy-and wavelength-dispersive spectrometries gave: Na(2)O 11.28, K(2)O 0.70, CaO 15.00, SiO(2) 66.36, F 1.28, Cl 0.18 and H(2)O (calc.) 4.27, O = F + Cl-0.58, total 98.49 wt.%. The empirical formula, based on 43 anions (O + F + Cl), is: (Na(5.33)Ca(0.91)K(0.22))(Sigma 6.46)Ca(3)Si(16.16)O(38)(F(0.99)OH(0.94)Cl(0.07))(Sigma 2)center dot 3H(2)O or, ideally, (Na, Ca, square)(6)Ca(3)Si(16) O(38)(F,OH)(2)center dot 3H(2)O. The mineral does not effervesce in 1:1 HCl at room temperature. The principal absorption bands in the infrared spectrum include 3443, 1631 and 1025 cm(-1) (shoulder at 1121 cm(-1)) with four bands in the region of 787-388 cm(-1). The mineral is triclinic, space group P<(1)over bar>, a 9.589(2), b 9.613(2), c 12.115(2) angstrom, alpha 96.62(2), beta 92.95(2), gamma 119.81(2)degrees, V 954.8(1) angstrom(3), Z = 2. The strongest seven lines in the X-ray powder-diffraction pattern [d in angstrom(I)(hkl)] are: 11.938(90)(001), 4.142(30)(2 (2) over bar0), 4.106(30)(020,0 (2) over bar1), 3.972(40)(003,1 (2) over bar2), 2.981(35)(2 (1) over bar3,004), 2.967(50)((12) over bar2,3 (1) over bar1,(1) over bar 04,(2) over bar 31) and 2.888(100)((1) over bar 23,121,2 (3) over bar2,(3) over bar 12). The crystal structure of lalondeite is strongly layered along [001], with sheets of tetrahedra (T) and octahedra (O). The T layers are composed of six-membered rings of SiO(4) tetrahedra cross-linked by SiO(4) tetrahedra, and the O layers contain edge-sharing M phi(6-7) octahedra and polyhedra (M: Na, Ca; phi: unspecified ligand). The O sheets are sandwiched between two symmetrically equivalent T layers (T(2), (T) over bar (2)), producing a strongly bonded T-O-T unit. The interlayer region houses disordered Na ions and H(2)O molecules. Stacking of the principal components perpendicular to [001] results in a OT(2)(T) over bar (2)O module, similar to that found in specific members of the reyerite-gyrolite group.

Notes:

430qy<br/>Times Cited:4<br/>Cited References Count:21

Reply a comment

Your email address will not be published. Required fields are marked *

Filtered HTML

  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.

Courses search

The wait is over. Signup today to maximize your future incomes

935 Ramsey Lake Road
Sudbury, Ontario
P3E 2C6
Canada

hes@laurentian.ca

+1 (705) 675-1151 ext 6575

Newsletter


casibomizmir escortizmir escort bayanMarsbahis güncel girişMarsbahis güncelMarsbahis giriş güncelMarsbahis girişMarsbahisBetturkey güncel girişBetturkey güncelBetturkey giriş güncelBetturkey girişBetturkeySekabet güncel girişSekabet güncelSekabet giriş güncelSekabet girişSekabetDinamobetDinamobet girişDinamobet giriş güncelDinamobet güncelDinamobet güncel girişFixbetFixbet girişFixbet giriş güncelFixbet güncelFixbet güncel girişMatadorbetMatadorbet girişMatadorbet giriş güncelMatadorbet güncelMatadorbet güncel girişBahiscasinoBahiscasino girişBahiscasino giriş güncelBahiscasino güncelBahiscasino güncel girişBahsegelBahsegel girişBahsegel giriş güncelBahsegel güncelBahsegel güncel girişBahiscomBahiscom girişBahiscom giriş güncelBahiscom güncelBahiscom güncel girişPadişahbetPadişahbet girişPadişahbet giriş güncelPadişahbet güncelPadişahbet güncel girişGalabetGalabet girişGalabet giriş güncelGalabet güncel girişGalabet güncelParibahisParibahis girişParibahis giriş güncelParibahis güncelParibahis güncel girişBetcioBetcio girişBetcio giriş güncelBetcio güncelBetcio güncel girişUltrabetUltrabet girişUltrabet giriş güncelUltrabet güncelUltrabet güncel girişOnwinOnwin girişOnwin giriş güncelOnwin güncelOnwin güncel girişİzmir escortEscort izmirİzmir escort bayanEscort bayan izmirBuca escortEscort bucaBuca escort bayanEscort bayan bucaBornova escortEscort bornovaBornova escort bayanEscort bayan bornovaKarşıyaka escortEscort karşıyakaKarşıyaka escort bayanEscort bayan karşıyakaÇiğli escortEscort çiğliÇiğli escort bayanEscort bayan çiğliÇeşme escortEscort çeşmeÇeşme escort bayanEscort bayan çeşmeKonak escortEscort konakKonak escort bayanEscort bayan konakAlsancak escortEscort alsancakAlsancak escort bayanEscort bayan alsancakİzmit escortEscort izmitİzmit escort bayanEscort bayan izmitKocaeli escortEscort kocaeliKocaeli escort bayanEscort bayan kocaeliGebze escortEscort gebzeGebze escort bayanEscort bayan gebzeSakarya escortEscort sakaryaSakarya escort bayanEscort bayan sakaryaSerdivan escortEscort serdivanSerdivan escort bayanEscort bayan serdivanSapanca escortEscort sapancaSapanca escort bayanEscort bayan sapancaTekirdağ escortEscort tekirdağTekirdağ escort bayanEscort bayan tekirdağÇorlu escortEscort çorluÇorlu escort bayanEscort bayan çorluÇerkezköy escortEscort çerkezköyÇerkezköy escort bayanEscort bayan çerkezköyankara escortcasibom바카라사이트바카라사이트casibom girişhacklink satışAntalya escortEscort antalyaAntalya escort bayanEscort bayan antalyaAlanya escortEscort alanyaAlanya escort bayanEscort bayan alanyaManisa escortEscort manisaManisa escort bayanEscort bayan manisaKuşadası escortEscort kuşadasıKuşadası escort bayanEscort bayan kuşadasıÇanakkale escortEscort çanakkaleÇanakkale escort bayanEscort bayan çanakkaleKonya escortEscort konyaKonya escort bayanEscort bayan konyaKayseri escortEscort kayseriKayseri escort bayanEscort bayan kayseriGaziantep escortEscort gaziantepGaziantep escort bayanEscort bayan gaziantepMersin escortEscort mersinMersin escort bayanEscort bayan mersinBodrum escortEscort bodrumBodrum escort bayanEscort bayan bodrumFethiye escortEscort fethiyeFethiye escort bayanEscort bayan fethiyeElazığ escortEscort elazığElazığ escort bayanEscort bayan elazığAdana escortEscort adanaAdana escort bayanEscort bayan adanaSamsun escortEscort samsunSamsun escort bayanEscort bayan samsunDenizli escortEscort denizliDenizli escort bayanEscort bayan denizliMalatya escortEscort malatyaMalatya escort bayanEscort bayan malatyaEskişehir escortEscort eskişehirEskişehir escort bayanEscort bayan eskişehirDiyarbakır escortEscort diyarbakırDiyarbakır escort bayanEscort bayan diyarbakırVan escortEscort vanVan escort bayanEscort bayan vanHatay escortEscort hatayHatay escort bayanEscort bayan hatayCasibomCasibom girişCasibom giriş güncelCasibom güncelCasibom güncel girişPusulabetPusulabet girişİzmir escortEscort izmirİzmir escort bayanEscort bayan izmirDoha escortEscort dohaDoha escortsQatar escortEscort qatar