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

PEATITE-(Y) AND RAMIKITE-(Y), TWO NEW Na-Li-Y±Zr PHOSPHATE-CARBONATE MINERALS FROM THE POUDRETTE PEGMATITE, MONT SAINT-HILAIRE, QUEBEC

Publication Type:

Journal Article

Source:

The Canadian MineralogistThe Canadian Mineralogist, Volume 51, Number 4, p.569-596 (2013)

ISBN:

0008-4476<br/>1499-1276

Keywords:

body-centered cubic iron, carbonate, crystal structures, heavy rare-earths, lithium, Mont Saint-Hilaire, new minerals, paragenesis, peatite-(Y), perovskite, phosphate, Poudrette pegmatite, ramikite-(Y), yttrium-zirconium

Abstract:

Peatite-(Y), Li4Na12(Y,Na,Ca,HREE)12(PO4)12(CO3)4(F,OH)8, and ramikite-(Y), Li4Na12(Y,Ca,HREE)6Zr6(PO4)12(CO3)4 O4(OH,F)4, are two new minerals discovered in the core of the Poudrette pegmatite at Mont Saint-Hilaire, Quebec. Epitactic-like, euhedral crystals (pseudocubes) of both minerals range from 0.1 to 1 mm in size (average: 0.2 mm), with ramikite-(Y) forming yellowish-white cores (dominant) and peatite-(Y) occurring as thin (< 50 um) pale pink rims. Crystals of peatite-(Y) exhibit the dominant forms pinacoid {100}, {010}, and {001} and the minor forms rhombic prism {110}, {101}, and {011}, with crystals of ramikite-(Y) showing the possible forms pedion {100}, {00 Formula }, {010}, {0 Formula 0}, {001}, and {00 Formula }. The most common associated minerals include albite, rhodochrosite, siderite, chabazite-Na, synchysite-(Ce), and sabinaite. Peatite-(Y) displays a brittle fracture with very good {100}, {010}, and {001} cleavages; ramikite-(Y) has a splintery fracture with possible weak to poor {100}, {010}, and {001} cleavages. Peatite-(Y) has a vitreous luster and ramikite-(Y) has a vitreous to dull luster. Both minerals have a white streak and neither shows any discernible fluorescence under long-, medium-, or short-wave ultraviolet radiation. Both minerals have an approximate Mohs hardness of 3. Peatite-(Y) has a calculated density of 3.62(1) g/cm3 and ramikite-(Y) of 3.60(1) g/cm3. Both minerals have a very low birefringence (~100), exhibit parallel extinction, and give poor interference figures; the optic sign and measured 2V of both are unknown. Only one refractive index for each could be measured: peatite-(Y), β = 1.601(1) and for ramikite-(Y), β = 1.636 (1). Four analyses of peatite-(Y) gave an average (range) of (wt. %): Li2O 1.96 (calc.), Na2O 12.95 (12.50–13.30), CaO 1.15 (0.98–1.51), Y2O3 37.32 (37.01–37.52), Gd2O3 0.61 (0.54–0.74), Dy2O3 3.08 (2.91–3.44), Ho2O3 0.67 (b.d.−1.02), Er2O3 2.88 (2.59–3.15), Tm2O3 0.28 (b.d.−0.40), Yb2O3 1.78 (1.67–1.92), ZrO2 0.67 (0.63–0.70), ThO2 0.37 (b.d.−0.56), P2O5 27.29 (27.09–27.64), F 4.35 (4.03–4.62), CO2 5.79 (calc.), H2O 0.31 (calc.), O = F −1.83, total 99.75, corresponding to Li4Na12(Y10.06Na0.72Ca0.62Dy0.50Er0.46Yb0.28Zr0.17Ho0.11Gd0.10Tm0.04Th0.04Tb0.02)Σ13.12 (PO4)11.70(CO3)4[F6.97(OH)1.03]Σ8 and the simplified formula, Li4Na12(Y,Na,Ca,HREE)12 (PO4)12(CO3)4(F,OH)8. For ramikite-(Y), 22 analyses gave an average (range) of (wt. %): Li2O 2.01 (calc.), Na2O 11.25 (10.32–13.34), CaO 4.15 (4.01–4.27), Y2O3 16.48 (14.88–18.25), La2O3 0.11 (b.d.−0.48), Ce2O3 0.10 (b.d.−0.40), Nd2O3 0.08 (b.d.−0.31), Dy2O3 1.11 (0.96–1.23), Er2O3 1.18 (1.01–1.36), Yb2O3 0.57 (0.46–0.68), ZrO2 23.40 (22.66–24.70), ThO2 0.49 (b.d.−0.70), HfO2 0.69 (0.48–0.92), Al2O3 0.14 (0.09–0.22), P2O5 28.10 (27.47–28.58), F 0.62 (0.24–0.90), CO2 5.92 (calc.), H2O 0.92 (calc.), O = F −0.26, total 97.06, corresponding to Li4(Na10.79Ca1.21)Σ12(Y4.34Ca0.99Dy0.18Er0.18Yb0.09La0.02Ce0.02Nd0.01)Σ5.83(Zr5.65Hf0.10Th0.06)Σ5.81 [(P0.98Al0.01)Σ0.99 O4]12 (CO3)4O4[(OH)3.03F0.97]Σ4.00 and the simplified formula, Li4(Na,Ca)12 (Y,Ca,HREE)6 Zr6(PO4)12(CO3)4O4(OH,F)4. In both peatite-(Y) and ramikite-(Y), the presence of Li2O was confirmed via crystal-structure and LAM-ICP-MS analyses and both H2O and CO2 via results of crystal-structure, infrared, and Raman analyses. Peatite-(Y) crystallizes in space group P222 with a 11.167(2), b 11.164(2), c 11.162(2) Å, V 1391.7(1) Å3, and Z = 1, and ramikite-(Y) in space group P1 with a 10.9977(6), b 10.9985(6), c 10.9966(6) Å, α 90.075(4), β 89.984(4), γ 89.969(4)°, V 1330.1(1) Å3, and Z = 1. The strongest six lines on the X-ray powder-diffraction pattern [d in Å (I) (hkl)] for peatite-(Y) are: 4.56(57)(211,121,112), 3.95(57)(220,202,022), 3.54(46) (310,301,130), 2.99(83)(321,312,231), 2.63(100)(330,303,033), 2.149(42)(333) and for ramikite-(Y): 11.04(76)(0 Formula 0,100,00 Formula ), 7.80(79)(0 Formula 1,110,101), 6.36(75)(11 Formula ,1 Formula 1,111,1 Formula Formula ), 3.89(100)(0 Formula 2,220,202), 2.94(98)(13 Formula ,12 Formula ,23 Formula ), 2.59(98)(0 Formula 3,330,303). The crystal structure of peatite-(Y) was refined to R = 3.37 % and wR2 = 9.36 % for 3816 reflections and that of ramikite-(Y) to R = 5.13% and wR2 = 13.06% for 8272 reflections. While not strictly isostructural, both minerals have similar crystal structures dominated by Mφ8 polyhedra (M = Y,Zr; φ = unspecified ligand). These are linked into six-membered, edge- or corner-sharing clusters, which in turn are joined together by PO4 tetrahedra. Both LiO6 octahedra and CO3 groups are positioned within the corner-sharing clusters. Linkages among all these polyhedra produce an open, equidimensional framework structure, with Na occupying the resulting cavities. Although possessing complex crystal structures, both minerals may be considered more simply as homeotypes of body-centered cubic Fe (or CsCl) or, alternatively, as complex derivatives of cation-deficient perovskite-related structures. Both minerals are late-stage products, possibly related to the in situ alteration of the pre-existing mineral assemblage (dawsonite, burbankite-group minerals, sabinaite, muscovite-polylithionite, etc.) present in the core of the Poudrette pegmatite.<br/>

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 qatar바카라사이트