Mineral phase
IMA name
Ulvöspinel
Secondary names
Ferro-ortho-titanate
Class
non-silicate mineral
Compound type
oxide-hydroxide
Comments
Equivalent Space Group: Fd3m (227)
Formula
$Fe^{2+}_2\!TiO_4$
Chemical formula
(Fe2+)2TiO4
Elemental formula
(Fe2+)2 Ti O4
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Fe^{2+}$ Iron(II) cation element 2 constituent element main
$Ti$ Titanium element 1 constituent element main
$O$ Oxygen element 4 constituent element main
Composition comments
Common impurities: generaly magnetite ($Fe^{2+}\!Fe^{3+}_2\!O_4$) or pseudo brookite ($TiO_2$)
Oxides
Formula $FeO$ $TiO_{2}$
Mass fraction (%) 64.27 35.73

Strunz

Class
oxides - hydroxides - arsenites (04)
Division
metal:oxygen = 3:4 and similar (04.B)
Family
with only medium-sized cations (04.BB)
Code
04.BB.05

Dana

Major class
oxides and hydroxides (III)
Class
multiple oxides (07)
Type
(A+B++)2X4 Spinel group (07.02)
Group
Titanium subgroup (07.02.05)
Code
07.02.05.02
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fd-3m
Molar mass
223.57 $g/mol$
Density
4.91 $g/cm^3$
State NTP
solid
Refringence type
isotropic
Refringence sign
no
Birefringence
0
Refraction index $n_{\alpha}$
2.28
Pure color
black
Color
black, iron-black, brown in reflected light
Diaphaneity
opaque
Luster
metallic