Constituent Ulexite | SSHADE

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Constituent

Name: Ulexite
IMA name: Ulexite

Class: non-silicate mineral
Compound type: borate
Comments: silky in fibrous aggregates

Constituent abundance in material

Relevance: main - major
Arrangement: in multi-phases
Mass fraction: 0.12 $\pm$ 0.2

Chemical composition

Formula: $NaCaB_5O_6(OH)_6 \bullet 5(H_2O)$
Chemical formula: NaCaB5O6(OH)6•5(H2O)
Elemental formula: (Na+) (Ca2+) B5 O11 H16 (O-)6
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Na^+$	Sodium cation	element	1		constituent cation	main
	$Ca^{2+}$	Calcium cation	element	1		constituent cation	main
	$B$	Boron	element	5		constituent element	main
	$O$	Oxygen	element	6		constituent element	main
	$(OH)^-$	Hydroxide anion	chemical function	6		anionic radical	main
	$H_2O$	Water	molecule	5		hydration	main

Chemical functions and bonds

Chemical functions

	Function	Number	Relevance
	$(OH)^-$	6
	$R-OH$	2	main

Chemical bonds

	Bond	Number	Relevance
	$>B-O-$	6
	$\geq B-O-$	12
	$-O-H$	2	main
	$O^--H$	1

Oxides composition

Oxides

Formula	$Na_{2}O$	$CaO$	$B_{2}O_{3}$	$H_{2}O$
Mass fraction (%)	7.65	13.84	42.95	35.57

Classifications

Strunz

Class: borates (06)
Division: pentaborates (06.E)
Family: Neso-pentaborates (06.EA)
Code: 06.EA.25

Dana

Major class: carbonates, nitrates, borates (V)
Class: hydrated borates containing hydroxyl or halogen (26)
Type: 26.05
Group: -Ulexite- group (26.05.11)
Code: 26.05.11.01

Phase type: crystalline

Crystallography

Crystal system: triclinic
Crystal class: pinacoidal
Crystal class symbol: -1 (Ci)
Crystal spacegroup: P-1

Physical properties

Molar mass: 405.23 $g/mol$
Density: 1.955 $g/cm^3$

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.030
Refraction index $n_{\alpha}$: 1.49
Refraction index $n_{\beta}$: 1.51
Refraction index $n_{\gamma}$: 1.52
Dispersion V: none
Color: colorless, white
Diaphaneity: translucent
Luster: vitreous