IMA Code

Bmc

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Bi^{3+}$	Bismuth cation	element	1		constituent cation	main
	$O^{2-}$	Oxide anion	element	1		constituent anion	main
	$Cl^-$	Chloride anion	element	1		constituent anion	main

Chemical bonds

	Bond	Number
	$\cdot (\cdot) Bi^{3+} \cdot O^{2-} \cdot$	1
	$\cdot (\cdot) Bi^{3+} \cdot Cl^{-}$	1

Oxides

Formula	$Cl$
Mass fraction (%)	13.61

Oxides comments

Bi2O3=89.46%, -3.07 % -O=Cl2

Strunz

Class

halides (03)

Division

oxyhalides, hydroxyhalides and related double halides (03.D)

Family

With Pb (As,Sb,Bi), without Cu (03.DC)

Code

03.DC.25

Dana

Major class

halides (IV)

Class

oxyhalides and hydroxyhalides (10)

Type

where A (O,OH) Xq (10.02)

Group

Bismoclite Group (10.02.01)

Code

10.02.01.02

Phase type

crystalline

Crystal system

tetragonal

Crystal class

ditetragonal-dipyramidal

Crystal class symbol

4/mmm (D4h)

Crystal spacegroup

P4/nmm

Refringence type

uniaxial

Refringence sign

negative

Birefringence

0.2400

Refraction index $n_o$ (w)

2.15

Refraction index $n_e$ (e)

1.91

Pure color

colorless

Color

white, brown, colorless, gray, yellow, yellow brown

Diaphaneity

transparent to translucent

Luster

greasy

Links

• MinDAT: Bismoclite
• WebMineral: Bismoclite
• Wikipedia: Bismoclite