Decorative panel, and decorative floor covering consisting of said panels

A decorative panel, comprising:

• a core provided with an upper side and a lower side,
• a decorative top structure affixed on said upper side of the core,
• a first panel edge comprising a first coupling profile, and a second panel edge comprising a second coupling profile being designed to engage interlockingly with said first coupling profile of an adjacent panel by a fold-down movement and/or a vertical movement,
• wherein said core comprises:
• at least one composite layer comprising:
• at least one magnesia based cement,
• at least one of the following:
• citric acid, phosphoric acid, phosphate, or any combination thereof,
• particles dispersed in said at least one magnesia based cement, and
• at least one reinforcement layer embedded in said at least one composite layer,
• wherein the at least one magnesia based cement comprises at least one of the following:
• 5Mg(OH)2·MgSO4·5H2O (515-phase), Mg(OH)2·MgSO4·7H2O (517-phase), or any combination thereof,
• wherein the first coupling profile comprises:
• an upward tongue,
• at least one upward flank lying at a distance from the upward tongue,
• an upward groove formed in between the upward tongue and the upward flank wherein the upward groove is adapted to receive at least a part of a downward tongue of a second coupling profile of an adjacent panel, and
• at least one first locking element, and
• wherein the second coupling profile comprises:
• a first downward tongue,
• at least one first downward flank lying at a distance from the downward tongue,
• a first downward groove formed in between the downward tongue and the downward flank, wherein the downward groove is adapted to receive at least a part of an upward tongue of a first coupling profile of an adjacent panel, and
• at least one second locking element adapted for co-action with a first locking element of an adjacent panel.