Characterization of nickel doped Zn7Sb2O12 spinel phase using Rietveld refinement

Zn7Sb2O12 is known to adopt an inverse spinel crystal structure, in which Zn2+ occupies the eight tetrahedral positions and Sb5+ and Zn2+ randomly occupy the 16 octahedral positions. Samples of Zn7-xNixSb2O12 (X = 0, 1, 2, 3, and 4) were synthesized using a modified polymeric precursor method, known as the Pechini method. The crystal structure of the powders was characterized by Rietveld refinement with X-ray diffraction data. The results show that for X = 0, 1, and 2 Ni substitutes for Zn2+ in the octahedral sites, and that for X = 3 and 4 it is assumed that Ni2+ replaces Zn2+ ions in both the octahedral and tetrahedral positions. It is also observed for x = 3 and 4 the formation of two spinel phases. (C) 2003 International Centre for Diffraction Data.

Crystal structure refinement of Co-doped lanthanum chromites

Results of crystal structure refinements and phase quantification for samples of Co-doped lanthanum chromites with nominal composition LaCr(1-x)Co(x)O(3), for x=0.00, 0.10, 0.20, and 0.30, prepared by combustion synthesis are presented. The resulting powders were characterized by scanning electron microscopy and X-ray diffraction (XRD). The XRD patterns were obtained with Cu K alpha radiation for non-doped lanthanum chromite sample and additionally with Cr K alpha radiation for Co-doped lanthanum chromites samples, in order to enhance the signal from scattering. Rietveld analysis of XRD data showed that the studied samples presented the lanthanum chromite with an orthorhombic structure (Pnma), except for the composition with x=0.30, in which the space group was found to be R (3) over barc. (C) 2008 International Centre for Diffraction Data.

A presença da matemática na escola Liceu Cuiabano: uma perspectiva histórica

Pós-graduação em Educação Matemática - IGCE

Mental Health and Gun Control Briefing Report

The issue of gun control has once again become a highly contested issue in the United States after the most recent mass shootings at a movie theatre in Aurora, CO, a Sikh temple in Wisconsin, a mall in Portland, OR, and involving Representative Gabby Giffords in Arizona. However, it was not until the horrific tragedy in Newtown, CT, where 20 children and 6 adult staff members were fatally shot at Sandy Hook Elementary School, that the gun control debate reached its peak.

Grundlehren der Algebra : Zum Gebrauch in Schulen und zum Selbstunterricht

Von J. Ineichen, Professor der Physik am Lyceum zu Luzern

Tevârîh-i Âl-i Osman : manuscript, undated

Popular history that starts with stories of the prophets (ff. 5r-17v) the offers anecdotes from the life of Prophet Muḥammad (ff. 17v-20v) and the four rightly guided caliphs and narrates history of Islamic dynasties (ff. 20v-35v). History of Ottoman family starts with Ertuġrıl and ends with at Süleymān Qānūnī (ff. 35v-60v). Enumerates sultan's campaigns, charitable foundations they established, and noteworthy contemporary scholars and religious personalities.

Dürr-i meknûn : manuscript, undated

A treatise on articles of faith written by order of a certain Sinān Beg (f. 1v), composed in the form of questions and answers. Author's name doesn't appear anywhere in this copy. According to the Giresun catalogue entry (Tüyatok, 193), this work was commissioned by Emir ʻĪsá Beg and written in 804 AH [1401 or 02 AD].

Ḥusāmkātī fī al-manṭiq : manuscript, undated

Commentary on the Īsāghūjī [Isagoge], "Introduction to logic", by al-Abharī.

Hādhā kitāb Tuḥfat al-mulūk : manuscript, 1658

A short treatise on Ḥanafī fiqh.

Nuzhat al-nāẓirīn fī tārīkh man waliya Miṣr min al-khulafāʼ wa-al-nāṣirīn : manuscript, 1777

بسم الله الرحمن الرحيم وبه تعال قال العبد الفقير الى الله تعالاى مرعي بن يوسف الحنبلي ... :Incipit

Annals of the New York Academy of Sciences

Records of meetings 1898-1916 in v. 11-27.

Methods for collecting ash (Fraxinus spp.) seeds /

Format not distributed to depository libraries.

Deutschland.

Mode of access: Internet.

Chemung River drainage basin series. Report[s.

1. Newtown Creek drainage basin.--2. Chemung River drainage basin.

Atlas of climate change effects in 150 bird species of the Eastern United States /

"September 2004"--P. [2] of cover.