Mineral phase
IMA name
Yavapaiite
Type
Class
non-silicate mineral
Compound type
sulfate
Chemical composition
Formula
$KFe^{3+}(SO_4)_2$
Chemical formula
K(Fe3+)(SO4)2
Elemental formula
(K+) (Fe3+) S2 O4 (O-)4
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$K^+$ Potassium(1+) cation element 1 constituent cation main
$Fe^{3+}$ Iron(III) cation element 1 constituent cation main
$(SO_4)^{2-}$ Sulfate anion chemical function 2 anionic radical main
Chemical functions
  Function Number
$(SO_4)^{2-}$ 2
Chemical bonds
  Bond Number
$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$ 4
Oxides
Formula $K_{2}O$ $Fe_{2}O_{3}$ $SO_{3}$
Mass fraction (%) 16.41 27.81 55.78

Strunz

Class
sulfates - chromates - molybdates - tungstates (07)
Division
sulfates (selenates, etc.) without additional anions, without H2O (07.A)
Family
with medium-sized and large cations (07.AC)
Code
07.AC.15

Dana

Major class
sulfates, chromates, selenates (VI)
Class
anhydrous acid and sulfates (28)
Type
where (A++)XO4 (28.03)
Group
-Yavapaiite- group (28.03.04)
Code
28.03.04.01
Phase type
crystalline
Crystal system
monoclinic
Crystal class
prismatic
Crystal class symbol
2/m (C2h)
Crystal spacegroup
C2/m
Molar mass
287.07 $g/mol$
Density
2.88 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.105
Refraction index $n_{\alpha}$
1.593
Refraction index $n_{\beta}$
1.684
Refraction index $n_{\gamma}$
1.698
Dispersion V
r > v strong
Color
light pink
Diaphaneity
transparent
Luster
vitreous
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