Mechanical exfoliation and Raman spectra of ultrathin PbI2 single crystal

2016 ◽  
Vol 168 ◽  
pp. 68-71 ◽  
Author(s):  
Peihua Wangyang ◽  
Hui Sun ◽  
Xinghua Zhu ◽  
Dingyu Yang ◽  
Xiuying Gao
Keyword(s):  
Single Crystal ◽  
Raman Spectra ◽  
Mechanical Exfoliation

Single Crystal Raman Spectra of the Phase Transition in KTCNQ

1982 ◽  
Vol 85 (1) ◽  
pp. 297-303 ◽  
Author(s):  
A. D. Bandrauk ◽  
K. D. Truong ◽  
S. Jandl
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Raman Spectra

Growth of Yb:Y2O3 single crystals by the micro-pulling-down method

2004 ◽  
Vol 848 ◽  
Author(s):  
A. Novoselov ◽  
J. H. Mun ◽  
A. Yoshikawa ◽  
G. Boulon ◽  
T. Fukuda
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Raman Spectra ◽  
Lattice Constant ◽  
Decay Time ◽  
Dopant Distribution ◽  
High Homogeneity ◽  
Linear Decrease ◽  
Crystal Laser

ABSTRACT(Ybx Y1-x)2O3 (x = 0.0, 0.005, 0.05, 0.08 and 0.15) promising single crystal laser rods of 4.2 mm in diameter and 15–20 mm in length have been grown from the rhenium crucible by the micro-pulling-down method in Ar + H2(3–4%) atmosphere. Linear decrease of lattice constant with the increase of Yb3+-content was observed. High homogeneity of the Yb3+-dopant distribution has been demonstrated. Absorption, emission and Raman spectra have been recorded and decay time was approximated.

scholarly journals THE POLARIZED RAMAN SPECTRA FOR SINGLE CRYSTAL LiB3O5

1996 ◽  
Vol 45 (5) ◽  
pp. 885
Author(s):  
JANG YI-JIAN ◽  
WANG YUE ◽  
ZENG LING-ZHI ◽  
LIU YU-LONG
Keyword(s):  
Single Crystal ◽  
Raman Spectra ◽  
Polarized Raman

Crystal chemistry of lamprophyllite-group minerals from the Murun alkaline complex (Russia) and pegmatites of Rocky Boy and Gordon Butte (USA): single crystal X-ray diffraction and Raman spectroscopy study

2021 ◽  
Vol 77 (2) ◽  
Author(s):  
Sergey M. Aksenov ◽  
Anastasia D. Ryanskaya ◽  
Yuliya V. Shchapova ◽  
Nikita V. Chukanov ◽  
Nikolay V. Vladykin ◽  
...  
Keyword(s):  
Solid Solution ◽  
Single Crystal ◽  
Raman Spectra ◽  
Crystal Chemistry ◽  
Solid Solution Series ◽  
X Ray Diffraction ◽  
Alkaline Complex ◽  
Oh Groups ◽  
X Ray ◽  
Solution Series

Specific features of the crystal chemistry of lamprophyllite-group minerals (LGMs) are discussed using the available literature data and the results of the single-crystal X-ray diffraction and a Raman spectroscopic studies of several samples taken from the Murun alkaline complex (Russia), and Rocky Boy and Gordon Butte pegmatites (USA) presented here. The studied samples are unique in their chemical features and the distribution of cations over structural sites. In particular, the sample from the Gordon Butte pegmatite is a member of the barytolamprophyllite–emmerichite solid solution series, whereas the samples from the Murun alkaline complex and from the Rocky Boy pegmatite are intermediate members of the solid solution series formed by lamprophyllite and a hypothetical Sr analogue of emmerichite. The predominance of O2− over OH− and F− at the X site is a specific feature of sample Cha-192 from the Murun alkaline complex. New data on the Raman spectra of LGMs obtained in this work show that the wavenumbers of the O—H stretching vibrations depend on the occupancies of the M2 and M3 sites coordinating with (OH)− groups. Cations other than Na+ and Ti4+ (mainly, Mg and Fe3+) can play a significant role in the coordination of the X site occupied by (OH)−. Data on polarized Raman spectra of an oriented sample indicate that the OH groups having different local coordinations have similar orientations with respect to the crystal. The calculated measures of similarity (Δ) for lamprophyllite and ericssonite are identical (0.157 and 0.077 for the 2M- and 2O-polytypes, respectively), which indicates that these minerals are crystal-chemically isotypic and probably should be considered within the same mineral group by analogy to the other mineralogical groups which combine isotypic minerals.

Crystal data for an adduct of orthotelluric acid and urea, Te(OH)6.2CO(NH2)2

1986 ◽  
Vol 19 (3) ◽  
pp. 202-202 ◽  
Author(s):  
J. Loub ◽  
M. Dušek
Keyword(s):  
Thermal Decomposition ◽  
Single Crystal ◽  
Raman Spectra ◽  
Title Compound ◽  
Infrared And Raman Spectra ◽  
Crystal Data ◽  
Acta Cryst ◽  
Powder Diffractometer

The crystal data of the title compound have been determined from single-crystal data [Loub, Haase & Mergehenn (1979). Acta Cryst. B35, 3039–3041]: C2/c, a = 14.828(8), b = 8.891(6), c = 10.023(7) Å, β = 129.13(3)°, V = 1025.0(9) Å3, Z = 4, Dm = 2.31(3), Dx = 2.27 Mg m−3. Power data obtained with powder diffractometer, θ–2θ scan, T = 295 K, Cu Kα radiation are presented. Infrared and Raman spectra are given. Thermal decomposition is reported [Fábry, Loub & Feltl (1982). J. Therm. Anal. 24, 95–100]. The JCPDS Diffraction File No. for C2H8N4O2Te(OH)6 is 36-1470.

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