Distribution of titanium between silicates and oxides in igneous rocks

Clicks: 3
ID: 293119
1962
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #1,639 of 8,486 articles by views in american journal of science

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 8,486 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Ti commonly occurs in igneous rocks as sphene (or perovskite), in solution in silicates (olivines, pyroxenes), and as iron-titanium oxides. Rocks are known in which there is more Ti in pyroxenes than in the oxides. From thermodynamic considerations it appears that when silicates and iron oxides coexist Ti will occur preferentially in the oxide phases at low partial pressure of O. Entry of Ti into pyroxenes is determined by the free energy of mixing and is therefore possible only at high temperature; the higher t temperature of crystallization of the pyroxene, the more Ti it is likely to contain. Al in 4-coordination (z-sites) in pyroxenes favors introduction of Ti; Al in 6-coordination (y-sites) does not. Other things being equal, more Ti is expected in pyroxenes in undersaturated magmas (low silica activity), and in those containing but little Fe. The assemblage hypersthene-rutile is less likely than enstatite (or clinoenstatite)-ilmenite; magnetite-sphene (or magnetite-perovskite) is more likely than diopside-ilmenite at low temperature and high partial pressure of O.
Reference Key
openalex_W2329337155 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors John Verhoogen
Journal american journal of science
Year 1962
DOI
10.2475/ajs.260.3.211
URL
https://ajs.scholasticahq.com/article/58913.pdf
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.