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1
Theoretical Chemistry from the Standpoint of Avogardro's ...
Hemimorphic Hemihedrism. L4, 1,; 2P, 2P'. Example: Iodo-suocinimide. C-4H,
02NI. 20. Trapezohedral Hemihedrism. 2L,, 4L2, 4L2'. Tetragonal Trapezohsdron
, 1-(hkl). Examples: Guanidine carbonate, Strychnine sulphate. 21. Pyramidal ...
2
A System of Mineralogy: Including an Extended Treatise on ...
2. All the similar angles, or edges, may be modified but by half the regular
number of planes. Figs. 28, 33, are examples of the first kind of hemihedrism, in
which half the angles of the cube are modified, while the remaining half are
unmodified.
3
A Handbook of Mineral Crystals, Rocks and Ores
HEMIHEDRISM Normal (galena type) and pyrite type of cubic system present an
interesting phenomena called hemihedrism. As the name suggests it refers to '
half the number of faces'. In Remark Forms Symbol Faces Tetrahedron (111) 4 ...
Pramod O. Alexander,
2009
4
An elementary introduction to mineralogy
R[ichard] H[arrison] Solly. 03 a 2 l 2 3 4 5 6 7 8 9 10 12 13 M 15 16 i7 18 l9 20 21
22 *3 »4 »5 4 3 6 3 6 — H 48 Holohedrism 4 3 6 — — — a 24 Asymmetric
hemihedrism 4 — 3 3 — — ir 24 Parallel hemihedrism 4 — 3 — 6 — k24 Inclined
...
R[ichard] H[arrison] Solly,
1894
The crystallographic character of these facettes was then pointed out, and their
connexion shown with this hemihedrism. But the most beautiful instance of the
connexion of hemihedrism in crystals with the direction of the rotatory power of
the ...
6
The London, Edinburgh and Dublin Philosophical Magazine and ...
The crystallographic character of these facettes was then pointed out, and their
connexion shown with this hemihedrism. But the most beautiful instance of the
connexion of hemihedrism in crystals with the direction of the rotatory power of
the ...
7
The London, Edinburgh and Dublin Philosophical Magazine and ...
It may be noticed that this mode of hemihedrism only affects the form of the 48-
faced figure {h k 1} ; so that in the case of cuprite, in which such faces are very
rare, it is not surprising that the hemihedral character has hitherto escaped
attention.
8
Electrical Communication
4. 1 HEMIHEDRISM Crystalline substances are divided into 32 classes, 21 of
which have no center of symmetry. The noncentered crystals may exhibit two
kinds of hemihedrism. A. Hemimorphous hemihedrism, antimorphous or ...
9
Journal of the Chemical Society
Pasteur's statement, that all substances optically active in solution crystallise in
hemihedral forms, has been discussed, amongst others, by Walden and
Hermann Traube (Ber., 1896, 29, 1692, 2446, &c). The determination of
hemihedrism is ...
The determination of hemihedrism is frequently attended with difiiculty ; simple
goniometric measurement is often inadequate, and many cases are_known
where earlier investigators failed to detect hemihedrism, the existence of which
was ...
Chemical Society (Great Britain),
1899