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NEWDIA4Planet SIGNED

Development of the new internally-heated diamond-anvil cell for planetary mineral physics: Application to high-pressure melting of H2O ice

Total Cost €

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EC-Contrib. €

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Partnership

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Project "NEWDIA4Planet" data sheet

The following table provides information about the project.

Coordinator
THE UNIVERSITY OF EDINBURGH 

Organization address
address: OLD COLLEGE, SOUTH BRIDGE
city: EDINBURGH
postcode: EH8 9YL
website: www.ed.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website https://blogs.ed.ac.uk/newdia4planet/
 Total cost 195˙454 €
 EC max contribution 195˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-CAR
 Starting year 2017
 Duration (year-month-day) from 2017-09-01   to  2019-08-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE UNIVERSITY OF EDINBURGH UK (EDINBURGH) coordinator 195˙454.00

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 Project objective

For the past few decades, diamond anvil cell (DAC) has been the most commonly used static high-pressure device to reproduce simultaneous high pressure (P) and temperature (T) conditions of deep planetary interiors. Laser-heated DAC achieved P-T conditions corresponding to the centre of the Earth. However, the laser heating system causes large temperature uncertainties (±10%), which is critical when one tries to understand planetary interiors based on phase relations of the candidate materials. The major objective of this proposal is therefore, to develop a new heating system for the DAC which enables us to heat the sample stably and homogeneously. The new design will be based on so-called internally-heated DAC (IHDAC). In an existing IHDAC, a thin metallic heater which is the sample at the same time, provides homogeneous high temperature. One of the limitations of the existing system is that it is applicable only to the metallic sample. Therefore, (1) we aim to develop a micro-heater configuration which can heat any type of materials, e.g., silicate, oxide, and H2O. We plan to achieve the P-T condition of P = 200 GPa and T = 4000 K. Then (2) we will conduct high-pressure melting experiments on H2O ice. The melting temperature of H2O ice under pressure places important constraints on the structure of Ice Giants such as Uranus and Neptune. Previously reported melting temperatures of H2O show large discrepancies, one of the major reasons for which is that most of those studies were based on the laser heating with large temperature uncertainties. Our new IHDAC will offer incontrovertible melting data from homogeneous and stable heating, and therefore it has a great potential to solve the long-standing controversy of the existing melting temperatures. Our new IHDAC will be a conventional technique for the researches on the planetary interior for the next decade.

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