Secondary names

Zinc calcium carbonate; Zn-Ca carbonate

IMA Code

Mrd

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Ca^{2+}$	Calcium cation	element	1		constituent cation	main
	$Zn^{2+}$	Zinc(II) cation	element	1		constituent cation	main
	$(CO_3)^{2-}$	Carbonate anion	chemical function	2		anionic radical	main

Chemical functions

	Function	Number
	$(CO_3)^{2-}$	2

Chemical bonds

	Bond	Number
	$\cdot Ca^{2+} \cdot O^{-}-$	2
	$\cdot Zn^{2+} \cdot O^{-}-$	2
	$\dddot - \dddot - C \dddot - O^{-2/3}$	3

Oxides

Formula	$CaO$	$ZnO$	$CO_{2}$
Mass fraction (%)	24.87	36.1	39.04

Strunz

Class

carbonates - nitrates (05)

Division

carbonates without additional anions, without H2O (05.A)

Family

Alkali-earth (and other M2+) carbonates (05.AB)

Code

05.AB.10

Dana

Major class

carbonates, nitrates, borates (V)

Class

anhydrous carbonates (14)

Type

with compound formula A+B++(CO3)2 (14.02)

Group

Dolomite group (Trigonal: R-3) (14.02.01)

Code

14.02.01.04

Phase type

crystalline

Crystal system

trigonal

Crystal class

rhombohedral

Crystal class symbol

-3 (S6)

Crystal spacegroup

R-3

Refringence type

uniaxial

Refringence sign

negative

Birefringence

0.20

Refraction index $n_o$ (w)

1.75

Refraction index $n_e$ (e)

1.55

Color

colorless, white

Diaphaneity

transparent to translucent

Luster

pearly

Links

• Mindat: Minrecordite
• WebMineral: Minrecordite
• Wikipedia: Minrecordite