Table 2 Compositions for phases in experimental runs AR2 and MR2

	AR2							MR2
	glass		Cuv		silica	Wo		glass		Cuv		silica	Wo
	mean	σ	mean	σ	mean	mean	σ	mean	σ	mean	σ	mean	mean	σ
Mass (%) oxide	n = 17		n = 5		n = 2	n = 3		n = 20		n = 5		n = 2	n = 3
SiO₂	60.7	0.4	63.5	0.8	97.65	53.6	0.6	61.7	2.1	61.9	0.6	96.07	52.6	0.3
Al₂O₃	1.43	0.17	0.16	0.13	0.33	0.3	0.03	0.6	0.15	0.19	0.03	0.38
Fe₂O₃	0.40	0.04						0.1	0.06
MgO								0.2	0.06
CaO	7.5	1.0	14.48	0.26	0.05	43.3	1.1	2.2	0.7	13.97	0.10	0.15	46.6	0.3
Na₂O	8.6	0.4				0.5	0.1	14.6	0.5			0.31
K₂O	0.30	0.01						0.2	0.18
P₂O₅								0.2	0.2
CuO	21.1	0.7	21.3	0.1	0.73	1.7	0.04	20.4	1.6	21.2	0.4	0.96	1.5	0.04
Total	100.07		99.47		98.75	99.4		100.3		97.30		97.86	100.6
Cations on the basis of X oxygens
X	10		10			3		10		10			3
Si	3.869		3.997			1.035		3.924		3.991			1.010
Al	0.108		0.012			0.007		0.045		0.015
Fe	0.008							0.002
Mg								0.015
Ca	0.512		0.976			0.895		0.153		0.964			0.958
Na	1.063					0.010		1.802
K	0.024							0.018
P								0.009
Cu	1.016		1.012			0.025		0.983		1.031			0.021
Total	6.599		5.997			1.971		6.952		6.001			1.990

Obtained by point analysis of chemical phases within polished cross sections expressed as mass% of oxides and associated cation stoichiometry, (uncertainties represent the 1 sigma level).
Cuv cuprorivaite, Wo wollastonite, X number of oxygens.

Quick links

Search