Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Ca^{2+}$	Calcium cation	element	1		constituent cation	main
	$V$	Vanadium	element	1		constituent element	main
	$Si$	Silicon	element	4		constituent element	main
	$O$	Oxygen	element	11		constituent element	main
	$H_2O$	Water	molecule	4		hydration	main

Chemical functions

	Function	Number
	$R-OH$	2

Chemical bonds

	Bond	Number
	$\geq Si-O-$	16
	$V-O$	5
	$-O-H$	2

Oxides

Formula	$CaO$	$V_{2}O_{5}$	$SiO_{2}$	$H_{2}O$
Mass fraction (%)	12.42	20.15	53.24	15.96

Strunz

Class

silicates (09)

Division

phyllosilicate (09.E)

Family

Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings (09.EA)

Code

09.EA.50

Dana

Major class

silicates (VIII)

Class

phyllosilicate modulated layers (74)

Type

with joined strips (74.03)

Group

V phyllosilicates (74.03.07)

Code

74.03.07.01

Phase type

crystalline

Crystal system

orthorhombic

Crystal class

dipyramidal

Crystal class symbol

mmm (D2h)

Crystal spacegroup

Pnma

Comments

not standard space group given as Pcmn (No 62)

Refringence type

biaxial

Refringence sign

positive

Birefringence

0.009

Refraction index $n_{\alpha}$

1.542

Refraction index $n_{\beta}$

1.544

Refraction index $n_{\gamma}$

1.551

Pure color

blue

Color

greenish blue, dark blue

Diaphaneity

transparent to translucent

Luster

vitreous

Links

• MinDAT: Cavansite
• WebMineral: Cavansite
• Wikipedia: Cavansite