IMA Code

Mix

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Bi^{3+}$	Bismuth cation	element	1		constituent cation	main
	$Cu^{2+}$	Copper cation	element	6		constituent cation	main
	$(AsO_4)^{3-}$	Arsenate anion	chemical function	3		anionic radical	main
	$(OH)^-$	Hydroxide anion	chemical function	6		anionic radical	main
	$H_2O$	Water	molecule	3		hydration	main

Chemical functions

	Function	Number
	$(AsO_4)^{3-}$	3
	$(OH)^-$	6
	$R-OH$	2

Chemical bonds

	Bond	Number
	$-O-H$	2
	$\dddot - \dddot - \dddot - As \dddot - O^{-3/4}$	3
	$O^--H$	1

Oxides

Formula	$CuO$	$As_{2}O_{5}$	$H_{2}O$
Mass fraction (%)	41.03	29.64	9.29

Oxides comments

and Bi2O3 20.03%

Strunz

Class

phosphates - arsenates - vanadates (08)

Division

phosphates, etc (08.D)

Family

With large and medium-sized cations, (OH, etc.):RO4 = 2:1 (08.DL)

Code

08.DL.15

Dana

Major class

phosphates, arsenates, vanadates (VII)

Class

hydrated phosphates containing hydroxyl or halogen (42)

Type

where (AB)7 (XO4)3 Zq·x(H2O) (42.05)

Group

Mixite group (Arsenate Series) (42.05.01)

Code

42.05.01.01

Phase type

crystalline

Crystal system

hexagonal

Crystal class

dipyramidal

Crystal class symbol

6/m (C6h)

Crystal spacegroup

P6(3)/m

Refringence type

uniaxial

Refringence sign

positive

Birefringence

0.080

Refraction index $n_o$ (w)

1.743 - 1.749

Refraction index $n_e$ (e)

1.810 - 1.830

Pure color

blue green

Color

blue green, yellow green, white, light blue, light green

Diaphaneity

transparent to translucent

Luster

adamantine

Links

• MinDAT: Mixite
• WebMineral: Mixite
• Wikipedia: Mixite