Macedonite

A rare accessory mineral in microcline-quartz syenite pegmatite veins and as inclusions in oxide phases in a metamorphosed Fe-Mn ore body.
Macedonite is an oxide single perovskite with second order Jahn-Teller distortions. The Macedonite from Crni Kamen is the only natural perovskite mineral known to contain significant amounts of Bi2O3 (2.2 wt.%) (Mitchell et al. 2016).

History

Activities related to discovery and approval of the group members

Structural context

Macedonite
Crystal System tetragonalCrystal Class ditetragonal dipyramidalSpace Group P4/nmm
a3.895—4 (3.9338)
b3.895—4.211 (3.976)
c3.875—4.171 (4.0678)
alpha90
beta90
gamma90
volume62.571—65.3 (63.5744)

Based on 5 measurements

Chemical context

Stoichiometric formulas

Macedonite
mindat.org
  • March 13, 2023PbTiO3
IMA
  • March 13, 2023PbTiO3
mineralogy.rocks
  • Aug. 30, 2022Pb2+Ti4+O3

Elements recorded on EPMA

5
O
5
Pb
5
Ti

Physical properties

ColorColor entities, recognized using a custom trained NER model
    • brownish yellow
    • greenish
    Color noteOriginal color note from the source
    Black with weak brownish tint; brownish yellow with greenish tint in thin section
    Lustre
    Vitreous
    Transparency
    Opaque
    Tenacity
    very brittle
    Hardness
    5.5—6
    Calculated density
    8.09