Polycrase
id:
polycrase-293-14757404
title:
Polycrase
text:
Polycrase or polycrase-(Y) is a black or brown metallic complex uranium yttrium oxide mineral with the chemical formula (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6. It is amorphous. It has a Mohs hardness of 5 to 6 and a specific gravity of 5. It is radioactive due to its uranium content. It occurs in granitic pegmatites. Polycrase forms a continuous series with the niobium rich rare earth oxide euxenite. It was first described in 1870 at Rasvag, Hidra (Hittero) Island, near Flekkefjord, Norway. It is found in
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Polycrase
date created:
date modified:
2023-02-13T02:48:57Z
main entity:
{"identifier":"Q3907734","url":"https://www.wikidata.org/entity/Q3907734"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/0/0a/Polycrase-%28Y%29-619586.jpg","width":418,"height":600}
fields total:
13
integrity:
14