Mineral phase
IMA name
Tengerite-(Y)
CAS number
5970-44-5
Type
Class
non-silicate mineral
Compound type
carbonate
Chemical composition
Formula
$Y_2(CO_3)_3 \bullet 2-3(H_2O)$
Chemical formula
Y2(CO3)3•2-3(H2O)
Elemental formula
(Y3+)2 C3 (O)5-3 (O-)6 (H)4-6
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Y^{3+}$ Yttrium cation element 2 constituent cation main
$(CO_3)^{2-}$ Carbonate anion chemical function 3 anionic radical main
$H_2O$ Water molecule 2 - 3 hydration main
Chemical functions
  Function Number
$(CO_3)^{2-}$ 3
$R-OH$ 2
Chemical bonds
  Bond Number
$\cdot (\cdot) Y^{3+} \cdot O^{-}-$ 6
$-O \dots H-$ 6
$-O-H$ 2
$\dddot - \dddot - C \dddot - O^{-2/3}$ 3
Oxides
Formula $Y_{2}O_{3}$ $H_{2}O$ $CO_{2}$
Mass fraction (%) 56.05 11.18 32.77

Strunz

Class
carbonates - nitrates (05)
Division
carbonates without additional anions, with H2O (05.C)
Family
with rare-earth elements (REE) (05.CC)
Code
05.CC.10

Dana

Major class
carbonates, nitrates, borates (V)
Class
hydrated carbonates (15)
Type
where A+(XO3)·x(H2O) (15.04)
Group
-Tengerite- group (15.04.03)
Code
15.04.03.01
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
dipyramidal
Crystal class symbol
mmm (D2h)
Crystal spacegroup
Pnnm
Molar mass
402.88 $g/mol$
Density
3.12 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
positive
Birefringence
0.029
Refraction index $n_{\alpha}$
1.587
Refraction index $n_{\beta}$
1.57
Refraction index $n_{\gamma}$
1.616
Pure color
colorless
Color
white
Diaphaneity
transparent to translucent
Luster
vitreous
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