mirage

Calcium-lead fluoro-vanadinite apatites. II. Equilibrium structures

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

Calcium-lead fluoro-vanadinite apatites. II. Equilibrium structures

Show full item record

Title: Calcium-lead fluoro-vanadinite apatites. II. Equilibrium structures
Author: Dong, Zhili; White, Timothy John
Copyright year: 2004
Abstract: The synthetic vanadinites (PbxCa10-x)(VO4)6(F1-2yOy&y)2, 0.57 < x < 9 and 0.10 < y < 0.47, adopt the P63/m apatite structure with 9.7835 (3)≤a≤10.0531 (1)Å and 7.0318 (2)≤c≤7.3033 (1)Å. The calcium endmember is monoclinic, space group P21/m, with a = 9.7370 (3), b = 9.7358 (4), c = 7.00572 (9)Å,γ = 120.002 (5)°. For mixed metal compounds (x≠0) the partitioning of calcium and lead over the AI(4f) and AII(6h) positions is nonstoichiometric, with lead preferentially favouring the larger AII site at a partitioning coefficient kPb(AI/AII) ≅ 0.33 for all x < 7. A miscibility gap exists for 2 < x < 3. Trends in crystallographic parameters can be correlated through consideration of the AIO6 metaprism twist angle (γ) that can be used to derive ideal cell parameters from triangular anion networks.
Subject: DRNTU::Engineering::Materials::Ecomaterials.
Type: Journal Article
Series/ Journal Title: Acta crystallographica B
School: School of Materials Science and Engineering
Rights: © 2004 International Union of Crystallography. This paper was published in Acta Crystallographica B and is made available as an electronic reprint (preprint) with permission of International Union of Crystallography. The paper can be found at the following DOI: http://dx.doi.org/10.1107/S0108768104001843. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Version: Published version

Files in this item

Files Size Format View
65. Calcium-Lea ... Equilibrium Structure.pdf 1.001Mb PDF View/Open
   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record

Statistics

Total views

All Items Views
Calcium-lead fluoro-vanadinite apatites. II. Equilibrium structures 342

Total downloads

All Bitstreams Views
65. Calcium-Lead Fluoro-Vanadinite Apatites II Equilibrium Structure.pdf 294

Top country downloads

Country Code Views
United States of America 108
China 86
Singapore 29
Taiwan 10
Japan 9

Top city downloads

city Views
Mountain View 70
Beijing 35
Singapore 28
Wuhan 6
Seoul 5

Downloads / month

  2014-06 2014-07 2014-08 total
65. Calcium-Lead Fluoro-Vanadinite Apatites II Equilibrium Structure.pdf 0 0 16 16