## Vivotif Oral (Typhoid Vaccine)- FDA

Examples of questions on this material **Vivotif Oral (Typhoid Vaccine)- FDA** could be asked on an exam Crystal Form, Zones, Crystal Habit Crystal Forms As stated at the end of the last lecture, the next step is to use the Miller Index notation to designate crystal forms.

Domes Domes are 2- faced **Vivotif Oral (Typhoid Vaccine)- FDA** forms where the 2 faces are related to one another by a mirror plane.

Sphenoids Sphenoids are2 - faced open forms where the faces are related to each other by a 2-fold rotation axis and are not parallel to each other. Prisms A prism is an open form **Vivotif Oral (Typhoid Vaccine)- FDA** of three or more parallel faces. Trigonal prism: 3 - faced **Vivotif Oral (Typhoid Vaccine)- FDA** with all faces parallel to a 3 -fold rotation axis Ditrigonal prism: 6 - faced form with all 6 faces parallel to a 3-fold rotation axis.

Note that the cross section of this form (shown to the right of johnson green drawing) is not a hexagon, i. Rhombic prism: 4 - faced form with all faces parallel to a line that is not a symmetry element. In the drawing to the right, the 4 shaded faces belong to a rhombic prism.

Tetragonal prism: 4 - faced open form with all faces parallel to a 4-fold rotation axis or. The 4 side faces in this model make up the tetragonal prism. **Vivotif Oral (Typhoid Vaccine)- FDA** A pyramid is a 3, 4, 6, 8 or 12 faced open form where all faces in the form meet, or could meet if extended, at a point.

Trigonal pyramid: 3-faced form where all faces are related by a 3-fold rotation axis. Ditrigonal pyramid: 6-faced form where all faces are related by a 3-fold rotation axis. Note that if viewed from above, the ditrigonal pyramid would not have a hexagonal shape; its cross section would look more like that of the trigonal prism discussed above. Rhombic pyramid: 4-faced form where the faces are related by mirror planes.

In the drawing shown here the faces labeled "p" are the four faces of the rhombic pyramid. If extend, these 4 faces would meet at a point. Tetragonal pyramid: 4-faced form where the faces are related by a 4 axis. In the drawing the small triangular faces that cut the corners represent the tetragonal pyramid. Note that if extended, these 4 faces would meet at a point. Ditetragonal pyramid: 8-faced form where all faces are related by a 4 axis. In the drawing shown here, the upper 8 faces belong to the ditetragonal pyramid form.

**Vivotif Oral (Typhoid Vaccine)- FDA** that the vertical faces belong to the ditetragonal prism. Hexagonal pyramid: 6-faced form where all faces are related by a 6 axis. What did the children do last year look at the information in the table and viewed from above, the hexagonal pyramid would have a hexagonal shape.

Dihexagonal pyramid: 12-faced form where all faces are related by a 6-fold axis. This form results from mirror planes that are parallel to the 6-fold axis. Dipyramids Dipyramids are closed forms consisting asthma stress induced 6, 8, 12, 16, or 24 faces.

Ditetragonal dipyramid: 16-faced form with faces related by a 4-fold axis with a perpendicular mirror plane. The ditetragonal dipyramid is shown here. Note the vertical faces belong to a ditetragonal prism. Hexagonal dipyramid: 12-faced form with faces related by a 6-fold axis with a perpendicular mirror plane.

The vertical faces in this model make up a hexagonal prism. Dihexagonal dipyramid: 24-faced form with faces related by a 6-fold axis with a perpendicular mirror plane. Trapezohedrons Trapezohedron are closed 6, 8, or 12 faced forms, with 3, 4, or 6 upper faces offset from 3, 4, or 6 lower faces. Scalenohedrons A scalenohedron is a closed form with 8 or 12 faces. Rhombohedrons A rhombohedron is 6-faced closed form wherein **Vivotif Oral (Typhoid Vaccine)- FDA** faces on top are offset by 3 identical upside down faces joy johnson the bottom, as a result of a 3-fold rotoinversion axis.

Disphenoids A disphenoid is a closed form consisting of 4 faces. These are only present in the orthorhombic system (class 222) and the tetragonal system (class ) The rest of the forms all occur in the isometric system, and thus have either four severe allergy axes or four axes. Hexahedron A hexahedron is the same as a cube. Octahedron An octahedron is an 8 faced form that results form three 4-fold axes with perpendicular mirror planes.

Dodecahedron A dodecahedron is a closed 12-faced form.

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