Mineral phase
IMA name
FULL Mineral
Secondary names
Spinoulette; spinoul
IMA Code
Spn
CAS number
99-99-99
Type
Class
non-silicate mineral
Compound type
oxide
Comments
tout est fake
très belle image !
jolie chenille ?
Chemical composition
Formula
$FAKE MgAl_2O_4$
Chemical formula
MgAl2O4
Elemental formula
(H)25-36 (2H)18-28 (Vo)20-30
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$H$ Full Natural element 1 constituent element main
$^2H$ or $D$ Full Isotope element 2 - 4 constituent element main
L-$(COOH)CH_2CHOH(COOH)$ FULL molecule molecule 4 - 6 constituent element main
Composition comments
common replacement: Zn, $Fe^{2+}\!$, $Mn^{2+}\!$ in place of Mg; $Fe^{3+}\!$, Cr, Ti, V in place of Al - common impurities: Ca in place of Mg; Zn, Si in place of Al
Chemical functions
  Function Number
$R-CH2-OH$ 1
$R-C(=O)-R$ 2
$R-CH2-OH$ 3
$R-C(=O)-R$ 1
R-V=R 2
Chemical bonds
  Bond Number
$-C \leq H_3$ 2
$=C=O$ 3
$-C \leq H_3$ 3
$=C=O$ 2
>V=V< 1
Oxides
Formula $Sm_{2}O_{3}$ $MoO_{2}$
Mass fraction (%) 71.67 28.33
Oxides comments
oxides_comments

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
Aluminium subgroup (07.02.01)
Code
07.02.01.01
End-members
Members
  • Fayalite (Mg = 0-10%, Fe = 100-90%)
  • Ferrohortonolite (Mg = 10-30%, Fe = 90-70%)
  • Hortonolite (Mg = 30-50%, Fe = 70-50%)
  • Hyalosiderite (Mg = 50-70%, Fe = 50-30%)
  • Chrysolite (Olivine) (Mg = 70-90%, Fe = 30-10%)
  • Forsterite (Mg = 90-100%, Fe = 10-0%)
Polymorphs
Phase name
Spinoulette
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fd-3m
Polytypes
  • Water ice Ic low density (fake)
  • fake tordu (fake 2)
Crystal sites
Label Nb Type Wp Specie Specie coordinence Specie occupancy Specie oxidation state
O1 2 substitutional 4u1  $H$ tetrahedral IV 0.2 0
 $^{16}O$ hexagonal prismatic XII 0.8 1
O2 4 split interstitial 6u2  $H$ tetrahedral IV 0.66 2
 $^{16}O$ hexagonal prismatic XII 0.33 3
Composition order
ordered
Comments
crystal_comments
Molar mass
142.27 $g/mol$
Density
3.57 - 3.72 $g/cm^3$
State NTP
metastable solid - other solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid decomposition liquid water, gas 273.16 K (611.66Pa)
solid-liquid liquid water 273.15 K (100 kPa)
Phase transitions comments
comments phase transition
Refringence type
isotropic
Refringence sign
no
Birefringence
0
Refraction index $n_{\alpha}$
1.72 - 1.80
Refraction index $n_{\beta}$
1.33
Refraction index $n_{\gamma}$
1.99
Dispersion V
2.3
Pure color
turquoise
Color
colorless, pink, red, violet, blue, green, brown, black
Diaphaneity
transparent to opaque
Luster
vitreous
Links
Publications