query: Is there a known physical crystal for each space group?
positive_passages.docid: 157435
positive_passages.text: How many of the 230 crystallographic groups are realized in nature?
negative_passages.docid: 12047
negative_passages.text: Tensors which are symmetric and antisymmetric in overlapping groups
negative_passages.docid: 112165
negative_passages.text: Classification of groups of order 12
negative_passages.docid: 104980
negative_passages.text: Possibilities for a group $G$ that acts faithfully on a set of objects with two orbits?
negative_passages.docid: 134269
negative_passages.text: Nuclear physics study materials
negative_passages.docid: 73528
negative_passages.text: Searching an unknown type of color in space
negative_passages.docid: 140945
negative_passages.text: Interstellar dust/matter distribution
negative_passages.docid: 142665
negative_passages.text: 7 sphere, is there any physical interpretation of exotic spheres?
negative_passages.docid: 1059
negative_passages.text: Identification of particles and anti-particles
negative_passages.docid: 14895
negative_passages.text: Reference for the subgroup structure of $\rm{PSL}_2(q)$
negative_passages.docid: 33152
negative_passages.text: Classifying groups of order 18
negative_passages.docid: 124224
negative_passages.text: How many groups of order $n$ with center {e} exist?
negative_passages.docid: 44165
negative_passages.text: the image of normal subgroups
negative_passages.docid: 139218
negative_passages.text: Is this group solvable?
negative_passages.docid: 104604
negative_passages.text: How do I find the values for the structure constants ($f^{abc}$) of a gauge group?
negative_passages.docid: 13319
negative_passages.text: Recognize physical constants?
negative_passages.docid: 94043
negative_passages.text: Can there be Electron and/or Proton Stars?