scholarly journals On the Influence of Sodium Oxide upon the Crystal Structure of Tricalcium Silicate

1961 ◽  
Vol 34 (10) ◽  
pp. 1536-1537 ◽  
Author(s):  
Goro Yamaguchi ◽  
Hiroshi Uchikawa
Keyword(s):  
Crystal Structure ◽  
Tricalcium Silicate ◽  
Sodium Oxide

scholarly journals X-ray diffraction analysis of MTA-Plus, MTA-Angelus and DiaRoot BioAggregate

2014 ◽  
Vol 08 (02) ◽  
pp. 211-215 ◽  
Author(s):  
Yeliz Guven ◽  
Elif Bahar Tuna ◽  
Muzaffer Emin Dincol ◽  
Oya Aktoren
Keyword(s):  
Crystal Structure ◽  
Tantalum Oxide ◽  
Xrd Analysis ◽  
Tricalcium Silicate ◽  
Dicalcium Silicate ◽  
Glass Slide ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tricalcium Aluminate

ABSTRACT Objective: The purpose of this study was to investigate and compare the crystalline structures of recently released MTA Plus (MTA-P), MTA Angelus (MTA-A), DiaRoot BioAggregate (BA) by X-ray diffraction (XRD) analysis. Materials and Methods: Phase analysis was carried out on powder and set forms of tested materials. The powder specimens placed into sample holders that were packed with a glass slide and the set samples prepared according to the manufacturer's instructions were placed into molds. The samples after being set for three days at 37°C and 100% humidity in an incubator were mounted onto the XRD machine and phase identification was accomplished using a search-match software program. Results: XRD findings indicated that major constituents of MTA-P were bismuth oxide, portlandite, dicalcium silicate and tricalcium silicate. The crystal structure of MTA-A were similar to those of MTA-P except for the absence of portlandite. Additionally, MTA-A had tricalcium aluminate differing from MTA-P. BA mainly differed from MTA-P and MTA-A by the radiopacifier (tantalum oxide-TO) in its composition. Conclusions: The majority of constituents of the tested materials have shown similarity except for the presence of tricalcium aluminate in MTA-A and the inclusion of TO in BA. In addition, set MTA-P showed a strong peak of portlandite.

Crystal Structure and Hydration Characteristics of Tricalcium Silicate Doped with Magnesium Oxide

2014 ◽  
Vol 936 ◽  
pp. 1336-1341
Author(s):  
Lin Chen ◽  
Xu Wang ◽  
Xiao Dong Shen ◽  
Su Hua Ma ◽  
Wei Qiang Zhou
Keyword(s):  
Crystal Structure ◽  
Chemical Analysis ◽  
Magnesium Oxide ◽  
Interstitial Atom ◽  
Early Stage ◽  
Tricalcium Silicate ◽  
Hydration Properties ◽  
Formation Kinetic ◽  
Hydration Characteristics ◽  
Substitutional Atom

The research investigates various methods to identify magnesium oxide influences on the crystal structure and hydration properties of tricalcium silicate. The f-CaO content of the clinkers were analyzed by chemical analysis. The complex disordered superstructure of the tricalcium silicate has been studied by a joint XRD, NMR and TEM. The results show that MgO exerts a remarkable influence on the polymorphisms of C3S. Mg is not only substitutional atom but also interstitial atom in the crystal lattice of tricalcium silicate. The HRTEM pattern of C3S doped with MgO is covered by the various irregular lattice. The addition of appropriate amount of MgO in raw meal can change the formation kinetic of C3S, slightly perturb the environment of SiO44- tetrahedral, modify the crystal structure of C3S and affect the hydration activity. Doped with MgO in the raw meal can slow down the hydration rate of alite slightly in early stage.

Darstellung und Kristallstruktur von KNaO und RbNaO / Preparation and Crystal Structure of KNaO and RbNaO

1982 ◽  
Vol 37 (7) ◽  
pp. 818-819 ◽  
Author(s):  
Horst Sabrowsky ◽  
Ulrich Schröer
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Type ◽  
Sodium Oxide ◽  
Crystal Data ◽  
Potassium Sodium

Abstract Potassium Sodium Oxide, Rubidium Sodium Oxide The compounds KNaO and RbNaO have been prepared and their structures determined by powder and single crystal data. Both compounds show the anti-PbFCl crystal structure type with two molecular units. KNaO: a = 400.2(1) pm, c = 621.4(2) pm, c/a= 1.553; RbNaO: a = 409.3(9) pm, c = 653.1(9) pm, c/a = 1.595.

ChemInform Abstract: Crystal Structure of Sodium Oxide Sulfate.

ChemInform ◽  
2010 ◽  
Vol 32 (44) ◽  
pp. no-no
Author(s):  
H. Haas ◽  
M. Jansen
Keyword(s):  
Crystal Structure ◽  
Sodium Oxide ◽  
Oxide Sulfate

Effect of strontium dioxide on the crystal structure and properties of tricalcium silicate

2012 ◽  
Vol 24 (6) ◽  
pp. 359-364 ◽  
Author(s):  
Shoude Wang ◽  
Guiqiang Li ◽  
Chaonan Yin ◽  
Lingchao Lu
Keyword(s):  
Crystal Structure ◽  
Tricalcium Silicate ◽  
Structure And Properties
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