CRYSTAL-CHEMICAL REGULARITIES AND IDENTIFICATION CRITERIA IN Fe-BEARING, K-DIOCTAHEDRAL 1M MICAS FROM X-RAY DIFFRACTION AND INFRARED SPECTROSCOPY DATA

2017 ◽  
Vol 65 (4) ◽  
pp. 234-251 ◽  
Author(s):  
Bella B. Zviagina ◽  
Victor A. Drits ◽  
Boris A. Sakharov ◽  
Tatiana A. Ivanovskaya ◽  
Olga V. Dorzhieva ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Crystal Chemical ◽  
Spectroscopy Data ◽  
X Ray Diffraction ◽  
X Ray

The Illite–Aluminoceladonite Series: Distinguishing Features and Identification Criteria from X-ray Diffraction and Infrared Spectroscopy Data

2015 ◽  
Vol 63 (5) ◽  
pp. 378-394 ◽  
Author(s):  
Bella B. Zviagina ◽  
Victor A. Drits ◽  
Jan Środoń ◽  
Douglas K. McCarty ◽  
Olga V. Dorzhieva
Keyword(s):  
Infrared Spectroscopy ◽  
Spectroscopy Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Distinguishing Features

scholarly journals Новые находки цеолитов на Карадаге

2021 ◽  
pp. 67-75
Author(s):  
А. И. Тищенко ◽  
А. В. Касаткин ◽  
Е. А. Шибаев
Keyword(s):  
Infrared Spectroscopy ◽  
Chemical Composition ◽  
Microprobe Analysis ◽  
Spectroscopy Data ◽  
X Ray Diffraction ◽  
X Ray

The paper reports on the first find of several minerals of Zeolite group in Karadag – heulandite-Na, clinoptilolite-Са, clinoptilolite-Na, stellerite, stilbite-Na, erionite-Ca, erionite-Na. The above minerals were identified by microprobe analysis, X-ray diffraction and infrared spectroscopy. Data on their morphology, chemical composition and paragenesis are given.

scholarly journals Crystal Chemical Relations in the Shchurovskyite Family: Synthesis and Crystal Structures of K2Cu[Cu3O]2(PO4)4 and K2.35Cu0.825[Cu3O]2(PO4)4

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 807
Author(s):  
Ilya V. Kornyakov ◽  
Sergey V. Krivovichev
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structural Complexity ◽  
Crystal Chemical ◽  
X Ray Diffraction ◽  
Complexity Measures ◽  
X Ray ◽  
The Family ◽  
Similarities And Differences ◽  
Related Compounds

Single crystals of two novel shchurovskyite-related compounds, K2Cu[Cu3O]2(PO4)4 (1) and K2.35Cu0.825[Cu3O]2(PO4)4 (2), were synthesized by crystallization from gaseous phase and structurally characterized using single-crystal X-ray diffraction analysis. The crystal structures of both compounds are based upon similar Cu-based layers, formed by rods of the [O2Cu6] dimers of oxocentered (OCu4) tetrahedra. The topologies of the layers show both similarities and differences from the shchurovskyite-type layers. The layers are connected in different fashions via additional Cu atoms located in the interlayer, in contrast to shchurovskyite, where the layers are linked by Ca2+ cations. The structures of the shchurovskyite family are characterized using information-based structural complexity measures, which demonstrate that the crystal structure of 1 is the simplest one, whereas that of 2 is the most complex in the family.

scholarly journals Valorization of Byproducts of Hemp Multipurpose Crop: Short Non-Aligned Bast Fibers as a Source of Nanocellulose

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4723
Author(s):  
Sara Dalle Vacche ◽  
Vijayaletchumy Karunakaran ◽  
Alessia Patrucco ◽  
Marina Zoccola ◽  
Loreleï Douard ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Cannabis Sativa ◽  
Crystallinity Index ◽  
Residual Lignin ◽  
Chemical Pretreatment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bast Fibers ◽  
Seed Maturity

Nanocellulose was extracted from short bast fibers, from hemp (Cannabis sativa L.) plants harvested at seed maturity, non-retted, and mechanically decorticated in a defibering apparatus, giving non-aligned fibers. A chemical pretreatment with NaOH and HCl allowed the removal of most of the non-cellulosic components of the fibers. No bleaching was performed. The chemically pretreated fibers were then refined in a beater and treated with a cellulase enzyme, followed by mechanical defibrillation in an ultrafine friction grinder. The fibers were characterized by microscopy, infrared spectroscopy, thermogravimetric analysis and X-ray diffraction after each step of the process to understand the evolution of their morphology and composition. The obtained nanocellulose suspension was composed of short nanofibrils with widths of 5–12 nm, stacks of nanofibrils with widths of 20–200 nm, and some larger fibers. The crystallinity index was found to increase from 74% for the raw fibers to 80% for the nanocellulose. The nanocellulose retained a yellowish color, indicating the presence of some residual lignin. The properties of the nanopaper prepared with the hemp nanocellulose were similar to those of nanopapers prepared with wood pulp-derived rod-like nanofibrils.

Synthesis and Crystal Structure of the Flexible Ligand Coordination Polymer [Co3(bpd)5.5(NCS)6(NH3)]n⋅2H2O(bpd= 1,4-bis (4-pyridyl)-2,3-diaza-1,3-butadiene)

2013 ◽  
Vol 803 ◽  
pp. 80-84
Author(s):  
Yu Qi Liu ◽  
Yong Yang ◽  
Rui Yang ◽  
Xiao Jun Xu
Keyword(s):  
Crystal Structure ◽  
Infrared Spectroscopy ◽  
Coordination Polymer ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Elemental Analyses ◽  
Ligand Coordination ◽  
Point Symbol

A novel metalorganic coordination polymer, namely [Co3(bpd)5.5(NCS)6(NH3)]n2H2O (1) (bpd=1,4-bis (4-pyridyl)-2,3-diaza-1,3-butadiene), has been synthesized and characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction. Compound 1 presents 2D[3,4,-connected 3-nodal net with the point symbol (4268210)(4462)(8210). In addition, four identical 2D single nets is interlocked with each other in parallel, thus directly leading to the formation of a polycatenated layer (2D2D).

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