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1. A guide vane in a gas turbine engine, the guide vane comprising: an inner platform comprising an outer surface, an inner surface, and a side surface; an outer platform comprising an outer surface, an inner surface and a side surface, the side surface of the outer platform defining a first outer seal slot, a second outer seal slot, and a third outer seal slot; an airfoil extending between the inner platform and the outer platform, the airfoil comprising a pressure sidewall and a suction sidewall meeting at a leading edge and a trailing edge, the pressure sidewall and the suction sidewall defining an airfoil interior, wherein the second outer seal slot is spaced apart from the first outer seal slot and meets the first outer seal slot, wherein the third outer seal slot extends between the first outer seal slot and the second outer seal slot, and wherein the first outer seal slot, the second outer seal slot, and the third outer seal slot forms a closed loop having three outer corners at the outer platform, wherein the side surface of the inner platform defines a first inner seal slot, a second inner seal slot, and a third inner seal slot, wherein the second inner seal slot is spaced apart from the first inner seal slot and meets the first inner seal slot, wherein the third inner seal slot extends between the first inner seal slot and the second inner seal slot, and wherein the first inner seal slot, the second inner seal slot, and the third inner seal slot forming a closed loop having three inner corners at the inner platform.
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