Povondraite
id:
povondraite-256-1847139
title:
Povondraite
text:
Povondraite is a rare silicate mineral from the tourmaline group with formula: NaFe3+3(Fe3+4,Mg2)(BO3)3Si6O18(OH)3O. It is a dark brown to black nearly opaque mineral with a resinous to splendent luster. It crystallizes in the trigonal crystal system as equant, distorted prisms with trigonal pyramid terminations. It occurs as rare fracture and cavity encrustations within schists derived from sedimentary rocks. Associated minerals include quartz, potassium feldspar, muscovite, schorl, riebeckite
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Povondraite
date created:
date modified:
2023-08-27T00:54:40Z
main entity:
{"identifier":"Q1889038","url":"https://www.wikidata.org/entity/Q1889038"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/c/c7/Povondraite-657308.jpg","width":465,"height":343}
fields total:
13
integrity:
14