Zur Kristallstruktur der gemischten Phosphat/Sulfat-Fluorapatite

It is shown that the apatite phases of composition Ca₁₀₋ₓNaₓ(PO₄)₆₋ₓ(SO₄)ₓF2 crystallize in a monoclinic unit cell, which is related to those of pure fluoroapatite by doubling the 6b-parameter. Some comparisons with related systems are made and a possible explanation for the origin of the small mono...

Full description

Bibliographic Details
Authors: Apella, María Cristina, Baran, Enrique José
Format: article
Status:Published version
Publication Date:1981
Country:Argentina
Institution:Universidad Nacional de La Plata
Repository:SEDICI (UNLP)
Language:indefinido
OAI Identifier:oai:sedici.unlp.edu.ar:10915/120746
Online Access:http://sedici.unlp.edu.ar/handle/10915/120746
Access Level:Open access
Keyword:Química
Phosphate-sulfate-apatites
Crystal data
Structural behaviour
Description
Summary:It is shown that the apatite phases of composition Ca₁₀₋ₓNaₓ(PO₄)₆₋ₓ(SO₄)ₓF2 crystallize in a monoclinic unit cell, which is related to those of pure fluoroapatite by doubling the 6b-parameter. Some comparisons with related systems are made and a possible explanation for the origin of the small monoclinic distortion is advanced.