Hingganite-(Nd), Nd2 Be2Si2O8(OH)2, a new gadolinite-supergroup mineral from Zagi Mountain, Pakistan

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00117560" target="_blank" >RIV/00216224:14310/20:00117560 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3749/canmin.2000039" target="_blank" >https://doi.org/10.3749/canmin.2000039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3749/canmin.2000039" target="_blank" >10.3749/canmin.2000039</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hingganite-(Nd), Nd2 Be2Si2O8(OH)2, a new gadolinite-supergroup mineral from Zagi Mountain, Pakistan

Popis výsledku v původním jazyce

Hingganite-(Nd), ideally Nd-2 square Be2Si2O8(OH)(2), is a new gadolinite group, gadolinite supergroup mineral discovered at Zagi Mountain. near Kafoor Dheri, about 4 km S of Warsak and 30 km NW of Peshawar, Khyber Pakhtunkhwa Province, Pakistan. The new mineral forms zones measuring up to 1 x 1 mm(2) in loose prismatic crystals up to 0.7 cm long. where it is intergrown with hingganite-(Y). Other associated minerals include aegirine, microcline, fergusonite-(Y), and zircon. Ilingganite-(Nd) is dark greenish-brown, transparent, has vitreous luster and a white streak. It is brittle and has a conchoidal fracture. No cleavage or parting are observed. Mohs hardness is 51/2 -6. D-calc =4.690 g/cm(3). Hingganite-(Nd) is non-pleochroic, optically biaxial (+), alpha = 1.746(5), beta=1.766(5), gamma =1.792(6) (589 nm). 2 V-meas = 80(7)degrees; 2 V-ca(lc) = 84 degrees. Dispersion of optical axes was not observed. The average chemical composition of hingganite-(Nd) is as follows (wt.%; electron microprobe, BeO, B2O3, and Lu2O3 content measured by LA-ICP-MS;H2O calculated by stoichiometry): BeO 9.64, CaO 0.45, MnO 0.10, FeO 3.03, B2O3 0.42, Y2O3 8.75, La2O3 1.63, Ce2O3 12.89, Pr2O3 3.09, Nd2O3 16.90, Sm2O3 5.97, Eu2O3 1.08, Gd2O3 5.15, Tb2O3 0.50, Dy2O3 2.50, Ho2O3 0.33, Er2O3 0.84, Tm2O3 0.10, Yb2O3 0.44, Lu2O3 0.04, ThO2 0.13, SiO2 23.55, H2O 2.72, total 100.25. The empirical formula calculated on the basis of 2 Si apfu is (Nd0.513Ce0.401Y0.395 SM0.175Gd0.145Pr0.096DY0.068La0.051Ca0.04IEU0.031Er0.022Tb0.014Yb0.011Ho0.009Tm0.003Th0.003Lu1 0.001)(Sigma 1.979)(square 0 0.778Fe0.2152+Mn0.007)(Sigma 1.000)(Be1.967B0.062)Sigma 2.029Si2O8.46(OH)(1.54). Hingganite-(Nd) is monoclinic, space group P2(1/c) with a = 4.77193(15), b = 7.6422(2), c = 9.9299(2) A, beta= 89.851(2)degrees, V= 362.123(14) angstrom(3), and Z=2. The strongest lines of the powder X-ray diffraction pattern [d, angstrom (I, %) (hid)] are: 6.105 (95) (011), 4.959 (56) (002), 4.773 (100) (100), 3.462 (58) (102), 3.122 (68) (11 (2) over bar), 3.028 (61) (013), 2.864 (87) (121), 2.573 (89) (113). The crystal structure of hingganite-(Nd) was refined from single-crystal X-ray diffraction data to R = 0.034 for 2007 unique reflections with / &gt; 2 sigma(/). The new mineral is named as an analogue of hingganite-(Y), hingganite-(Yb), and hingganite-(Ce), but with Nd dominant among the rare earth elements.

Název v anglickém jazyce

Hingganite-(Nd), Nd2 Be2Si2O8(OH)2, a new gadolinite-supergroup mineral from Zagi Mountain, Pakistan

Popis výsledku anglicky

Hingganite-(Nd), ideally Nd-2 square Be2Si2O8(OH)(2), is a new gadolinite group, gadolinite supergroup mineral discovered at Zagi Mountain. near Kafoor Dheri, about 4 km S of Warsak and 30 km NW of Peshawar, Khyber Pakhtunkhwa Province, Pakistan. The new mineral forms zones measuring up to 1 x 1 mm(2) in loose prismatic crystals up to 0.7 cm long. where it is intergrown with hingganite-(Y). Other associated minerals include aegirine, microcline, fergusonite-(Y), and zircon. Ilingganite-(Nd) is dark greenish-brown, transparent, has vitreous luster and a white streak. It is brittle and has a conchoidal fracture. No cleavage or parting are observed. Mohs hardness is 51/2 -6. D-calc =4.690 g/cm(3). Hingganite-(Nd) is non-pleochroic, optically biaxial (+), alpha = 1.746(5), beta=1.766(5), gamma =1.792(6) (589 nm). 2 V-meas = 80(7)degrees; 2 V-ca(lc) = 84 degrees. Dispersion of optical axes was not observed. The average chemical composition of hingganite-(Nd) is as follows (wt.%; electron microprobe, BeO, B2O3, and Lu2O3 content measured by LA-ICP-MS;H2O calculated by stoichiometry): BeO 9.64, CaO 0.45, MnO 0.10, FeO 3.03, B2O3 0.42, Y2O3 8.75, La2O3 1.63, Ce2O3 12.89, Pr2O3 3.09, Nd2O3 16.90, Sm2O3 5.97, Eu2O3 1.08, Gd2O3 5.15, Tb2O3 0.50, Dy2O3 2.50, Ho2O3 0.33, Er2O3 0.84, Tm2O3 0.10, Yb2O3 0.44, Lu2O3 0.04, ThO2 0.13, SiO2 23.55, H2O 2.72, total 100.25. The empirical formula calculated on the basis of 2 Si apfu is (Nd0.513Ce0.401Y0.395 SM0.175Gd0.145Pr0.096DY0.068La0.051Ca0.04IEU0.031Er0.022Tb0.014Yb0.011Ho0.009Tm0.003Th0.003Lu1 0.001)(Sigma 1.979)(square 0 0.778Fe0.2152+Mn0.007)(Sigma 1.000)(Be1.967B0.062)Sigma 2.029Si2O8.46(OH)(1.54). Hingganite-(Nd) is monoclinic, space group P2(1/c) with a = 4.77193(15), b = 7.6422(2), c = 9.9299(2) A, beta= 89.851(2)degrees, V= 362.123(14) angstrom(3), and Z=2. The strongest lines of the powder X-ray diffraction pattern [d, angstrom (I, %) (hid)] are: 6.105 (95) (011), 4.959 (56) (002), 4.773 (100) (100), 3.462 (58) (102), 3.122 (68) (11 (2) over bar), 3.028 (61) (013), 2.864 (87) (121), 2.573 (89) (113). The crystal structure of hingganite-(Nd) was refined from single-crystal X-ray diffraction data to R = 0.034 for 2007 unique reflections with / &gt; 2 sigma(/). The new mineral is named as an analogue of hingganite-(Y), hingganite-(Yb), and hingganite-(Ce), but with Nd dominant among the rare earth elements.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The Canadian Mineralogist

ISSN

0008-4476

e-ISSN

1499-1276

Svazek periodika

58

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CA - Kanada

Počet stran výsledku

14

Strana od-do

549-562

Kód UT WoS článku

000602734700001

EID výsledku v databázi Scopus

2-s2.0-85098618288