Class

silicate mineral

Compound type

sorosilicate

Comments

Epidote. Content = between ~1.22% and ~17.54% (Hyperspectral cube classification maps). Some crystals are too altered to determine their composition.

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Ca$	Calcium	element	2		constituent element	main
	$Al$	Aluminium	element	3		constituent element	main
	$Si$	Silicon	element	3		constituent element	main
	$O$	Oxygen	element	13		constituent element	main
	$H$	Hydrogen	element	1		constituent element	main

Chemical functions

	Function	Number
	$(SiO_4)^{4-}$	2

Chemical bonds

	Bond	Number
	$\geq Si-O^-$	4

Strunz

Class

silicates (09)

Division

sorosilicate (09.B)

Family

with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination (09.BG)

Code

09.BG.10

Dana

Major class

silicates (VIII)

Class

sorosilicate insular, mixed, single, and larger tetrahedral groups (58)

Type

with cations in [6] and higher coordination; single and double groups (n=1,2) (58.02)

Group

Epidote group (Zoisite subgroup) (58.02.01b)

Code

58.02.01b.01

Phase type

crystalline

Crystal system

orthorhombic

Crystal class

dipyramidal

Crystal class symbol

mmm (D2h)

Crystal spacegroup

Pnma

Molar mass

454.36 $g/mol$

Density

3.3 $g/cm^3$

Refringence type

biaxial

Refringence sign

positive

Birefringence

0.0060-0.0180

Refraction index $n_{\alpha}$

1.696-1.7

Refraction index $n_{\beta}$

1.696-1.702

Refraction index $n_{\gamma}$

1.702-1.718

Dispersion V

2V(Calc)=0-40, 2V(Meas)=0-70. Dispersion relatively strong

Color

Colorless, purple, greyish-white, grey, yellowish-brown, yellow, pink, green

Diaphaneity

transparent to subtranslucent

Luster

vitreous