Abstract: A solid electrolyte ceramic having a chemical composition represented by a specific general formula, and further including one or more transition metal elements selected from Co, Ni, Mn, and Fe, and having a garnet-type crystal structure in which a content X of Li and a content Y of D1 representing one or more elements selected from Ta, Nb, and Bi are each within specific ranges.

Abstract: A solid electrolyte ceramic having a chemical composition represented by: A?B?D?O? wherein A represents one or more of Li, Ga, Al, Mg, Zn, and Sc, and A includes at least Li; B represents one or more of La, Ca, Sr, Ba, and lanthanoid elements, and B includes at least La; and D represents one or more of transition elements capable of being six-coordinate with oxygen and elements belonging to Groups 12 to 15; and one or more of Co, Ni, Mn, and Fe, the solid electrolyte ceramic having a garnet-type crystal structure where: 139?Y<150 in a range of 330<X?370 wherein X (mol %) represents a content of the Li and Y (mol %) represents a content of the one or more elements represented by B when a content of the one or more elements represented by D in the general formula is 100 mol %.

Abstract: A solid electrolyte ceramic having a garnet-type crystal structure, the solid electrolyte ceramic containing at least Li, La, and O; and one or more transition metal elements selected from the group consisting of Co, Ni, Mn, and Fe, in which a content X (mol %) of one or more elements D selected from the group consisting of a transition element capable of providing six-coordination with oxygen and an element belonging to Groups 12 to 15 and a total content Y (mol %) of the transition metal elements satisfy at least one of three specific relational expressions.

Abstract: A solid electrolyte ceramic that has a garnet-type crystal structure, and contains: at least Li, La, and O; and one or more transition metal elements selected from the group consisting of Co, Ni, Mn, and Fe, wherein, when a content of the Li and a total content of the one or more transition metal elements are denoted respectively by X (mol %) and Y (mol %), the solid electrolyte ceramic satisfies any one of the following relational expressions (1) to (3): (1) 0.01?Y?4.00 in the range of 221?X<227; (2) 0.01?Y?6.00 in the range of 227?X<237; and (3) 0.01?Y?8.00 in the range of 237?X?250.

Abstract: A solid electrolyte ceramic that has a garnet-type crystal structure, and contains: at least Li (lithium), La (lanthanum), and O (oxygen); and one or more transition metal elements selected from the group consisting of Co (cobalt), Ni (nickel), Mn (manganese), and Fe (iron), wherein, when a content of La and a total content of the one or more transition metal elements are denoted respectively by X (mol %) and Y (mol %), the solid electrolyte ceramic satisfies any one of the following relational expressions (1) to (3): (1) 0.01?Y?6.0 in the range of 147.5<X<150.0; (2) 0.01?Y?9.0 in the range of 145.0<X<147.5; and (3) 0.01?Y?12.0 in the range of 132.0?X?145.0.