  Crystalline symmetries play an important role in the classification of band
structures, and the rich variety of spatial symmetries in solids leads to
various topological crystalline phases (TCPs). However, compared with
topological insulators and Dirac/Weyl semimetals, relatively few realistic
materials candidates have been proposed for TCPs. Based on our recently
developed method for the efficient discovery of topological materials using
symmetry indicators, we explore topological materials in five space groups
(i.e. SGs87,140,221,191,194), which are indexed by large order strong symmetry
based indicators (Z8 and Z12) allowing for the realization of several kinds of
gapless boundary states in a single compound. We predict many TCPs, and the
representative materials include: Pt3Ge(SG140), graphite(SG194), XPt3
(SG221,X=Sn,Pb), Au4Ti (SG87) and Ti2Sn (SG194). As by-products, we also find
that AgXF3 (SG140,X=Rb,Cs) and AgAsX (SG194,X=Sr,Ba) are good Dirac semimetals
with clean Fermi surface. The proposed materials provide a good platform to
study the novel properties emerging from the interplay between different types
of boundary states.
