| CPC C04B 7/425 (2013.01) [C04B 7/32 (2013.01); C04B 7/427 (2013.01); C04B 7/43 (2013.01)] | 19 Claims |
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1. A method comprising:
combining hyaloclastite with a first acid to form a first salt;
combining the first salt with a second acid to form a second salt;
heating the second salt to form an oxide; and
wherein the hyaloclastite is basaltic hyaloclastite or intermediate basaltic hyaloclastite, wherein the hyaloclastite has a volume-based mean particle size of less than or equal to approximately 500 um, wherein the hyaloclastite is approximately 5% to approximately 95% amorphous and wherein the hyaloclastite is approximately 5% to approximately 95% microcrystalline.
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