TRIGONAL CRYSTALS

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=27 BGCOLOR="#006699" TEXT="#080000"> <div> <FONT SIZE="2" COLOR="#FFFFFF" FACE="Arial" ><B>CHEMISTRY SCHOOL</B></FONT><FONT SIZE="1" COLOR="#FFFFCC" FACE="Arial" ><B>   </B></FONT><B> </B><A HREF="index.htm" TARGET="_top" TITLE="CHEMISTRY SCHOOL"><U>HOME PAGE - INDEX TO THE LESSONS</U></A>                  <B>      </B> • TRIGONAL  SHAPED •  MOLECULAR CRYSTALS</div> <div> </div> </td> </tr><tr> <td valign="top" width=248 BGCOLOR="#66CCCC" TEXT="#080000"> <div>  <FONT SIZE="1" COLOR="#0000BF" FACE="Arial" >    THE MOLECULAR CRYSTALS</FONT></div> <div>                 <A HREF="crystals.htm" TARGET="_top" TITLE="WHAT ARE CRYSTALS?"><U>INTRODUCTION</U></A></div> <div> <I>> RECTANGULAR FACED CRYSTALS</I></div> <div> 1. <A HREF="cubic_crystals.htm" TARGET="_top" TITLE="CUBIC CRYSTALS"><U>CUBIC CRYSTALS</U></A></div> <div> 2. <A HREF="tetragonal_crystals.htm" TARGET="_top" TITLE="TETRAGONAL CRYSTALS"><U>TETRAGONAL CRYSTALS</U></A></div> <div> 3  <A HREF="orthorhomic_crystal.htm" TARGET="_top" TITLE="SIMPLE ORTHORHOMBIC CRYSTALS"><U>SIMPLE ORTHO-RHOMBIC</U></A> </div> <div> 4. <A HREF="top_centered_orthorhomic_crystals.htm" TARGET="_top" TITLE="TOP CENTERED ORTHORHOMBIC"><U>TOP CENTERED ORTHORHOMBIC</U></A></div> <div> 5. <A HREF="face_centered_crystals.htm" TARGET="_top" TITLE="FACE CENTERED ORTHORHOMBIC"><U>FACE CENTERED ORTHORHOMBIC</U></A> </div> <div> 6. <A HREF="equi_centric_orthorombic.htm" TARGET="_top" TITLE="EQUICENTRIC ORTHORHOMBIC"><U>EQUI-CENTRIC ORTHORHOMBIC</U></A></div> <div> <I>> TRIANGULAR, RHOMBOHEDRAL</I></div> <div> <I>   & HEXAGONAL CRYSTALS </I></div> <div> 1. <A HREF="trigonal_crystals.htm" TARGET="_top" TITLE="TRIGONAL CRYSTALS"><U>TRIGONAL CRYSTALS</U></A></div> <div> 2. <A HREF="tetrahedral_molecular_crystals.htm" TARGET="_top" TITLE="TETRAHEDRAL CRYSTALS"><U>TETRA-HEDRAL  CRYSTALS </U></A></div> <div> 3. <A HREF="hexahedral_crystals.htm" TARGET="_top" TITLE="HEXAHEDRAL CRYSTALS"><U>HEXA-HEDRAL CRYSTALS</U></A></div> <div> 4. <A HREF="octa_hedral_crystals.htm" TARGET="_top" TITLE="OCTAHEDRAL CRYSTALS"><U>OCTA-HEDRAL CRYSTALS</U></A></div> <div> 5. <A HREF="rhombohedral_crystals.htm" TARGET="_top" TITLE="RHOMBOHEDRAL CRYSTALS"><U>RHOMBOHEDRAL CRYSTALS</U></A></div> <div> 6 .<A HREF="hexagonal_molecular_crystals.htm" TARGET="_top" TITLE="HEXAGONAL CRYSTALS"><U>HEXAGONAL CRYSTALS</U></A></div> <div> 7. <A HREF="parallelepiped_molecular_crystals.htm" TARGET="_top" TITLE="PARALLELEPIPED CRYSTALS"><U>PARALLELEPIPED CRYSTALS</U></A></div> <div>         </div> </td> <td valign="top" height=453 BGCOLOR="#66CCCC" TEXT="#080000"> <div> <I>TRIGONAL CRYSTALS</I></div> <DIV ALIGN="LEFT"></DIV> <div> <TABLE BORDER="1" CELLPADDING="5" CELLSPACING="0" WIDTH="501" BORDERCOLORLIGHT="#993380" BORDERCOLORDARK="#993380" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFFF > <tR> <tD VALIGN=TOP COLSPAN=2 HEIGHT= 15 ><NOBR><div> TRIGONAL MOLECULAR CRYSTALS</div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 121 ><NOBR><div>      1  HAVE 3 EQUAL SIDES</div> <div>          WITH SMALL FACETED ENDS              </div> <div>      2. HAVE 3 EQUAL SIDE ANGLES</div> <div>      3. MAY HAVE SMALL FACETS </div> <div>          ON THE TOP & BOTTOM,</div> <div>          OR AT THE CORNERS</div> </NOBR></tD> <tD VALIGN=CENTER WIDTH="241"><div> <IMG SRC="104e85620.gif" border=0 width="133" height="98" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> AN OVERALL VIEW OF THE CRYSTAL</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="241"><div> TOP, BOTTOM & SIDE VIEWS</div> </tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 127 WIDTH="234"><div> <IMG SRC="104b97720.gif" border=0 width="151" height="114" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="104ce27a0.gif" border=0 width="226" height="122" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> A SIMPLE TRIGONAL CRYSTAL</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="241"><div> A VIEW OF THE TOP & END</div> </tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 216 ><NOBR><div>   IN MINERALIZED WATER, </div> <div>   SIMPLE TRIGONAL MOLECULES</div> <div>   MAKE LONG EVENLY SPACED ROWS </div> <div>   THE SAME TRIGONAL MOLECULES </div> <div>   WHEN PLACED IN ETHYL ALCOHOL </div> <div>   MAKE A  FIELD OF MONOCLINIC </div> <div>   SHAPED CRYSTALS </div> <div>   AND WHEN PLACED IN ETHYLENE</div> <div>   MAKE A HEXAGONAL FIELD </div> <div>   OF STRONG HARD TABLETS,</div> <div>   AS SHOWN BELOW LEFT & RIGHT</div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="1045e8c60.gif" border=0 width="232" height="198" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 196 ><NOBR><div> <IMG SRC="1046c2b80.gif" border=0 width="194" height="184" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="1048e2bf0.gif" border=0 width="226" height="191" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 34 ><NOBR><div> MONO-CLINIC TRIGONAL MOLECULES</div> <div> IN A ETHYL ALCOHOL SOLUTION</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> 6 MOLECULE HEXAGONAL SHAPED</div> <div> CRYSTALS IN A ETHYLENE  SOLUTION</div> </NOBR></tD> </tR> <tR> <tD VALIGN=CENTER HEIGHT= 169 ><NOBR><div> <IMG SRC="1032dba20.gif" border=0 width="219" height="162" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <IMG SRC="1034ec690.gif" border=0 width="236" height="105" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> WATER, ETHYL ALCOHOL & ETHYLENE</div> <div> MAKE THE SAME TYPE OF CRYSTALS</div> <div> WITH THIS SHAPE OF CRYSTAL</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 34 WIDTH="234"><div> A BODY CENTERED </div> <div> TRIGONAL MOLECULE</div> </tD> <tD VALIGN=TOP WIDTH="241"><div> A VIEW OF THE TOP</div> <div> SIDES & ENDS</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 175 ><NOBR><div> <IMG SRC="104dba800.gif" border=0 width="186" height="128" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> TRIGONAL CRYSTALS HAVE VERTICAL</div> <div> SIDES WITH FACETED CORNERS</div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="1037db7c0.gif" border=0 width="219" height="124" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> TRIGONAL CRYSTALS MAY HAVE </div> <div> UP TO 12 TOP & BOTTOM FACETS</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> THE MOLECULE WITHIN THE CRYSTAL</div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> A VIEW OF THE FROZEN CRYSTAL</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 157 ><NOBR><div> <IMG SRC="103bde980.gif" border=0 width="222" height="152" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="103af3800.gif" border=0 width="243" height="128" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 34 WIDTH="234"><div> A BODY CENTERED </div> <div> TRIGONAL MOLECULE</div> </tD> <tD VALIGN=TOP WIDTH="241"><div> A VIEW OF THE TOP </div> <div>  SIDES & ENDS</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 175 ><NOBR><div> <IMG SRC="103ddaa70.gif" border=0 width="218" height="167" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=CENTER><NOBR><div> <IMG SRC="103fe6aa0.gif" border=0 width="230" height="170" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> THE MOLECULE INSIDE THE CRYSTAL</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="241"><div> A VIEW OF THE CRYSTAL</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 150 ><NOBR><div> <IMG SRC="1043b6910.gif" border=0 width="182" height="145" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <IMG SRC="1042af900.gif" border=0 width="175" height="144" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 15 ><NOBR><div> A BRANCHED TRIGONAL MOLECULE</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="241"><div> A VIEW FROM THE TOP</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 166 ><NOBR><div> <IMG SRC="1052b8a00.gif" border=0 width="184" height="160" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <IMG SRC="1051b5a10.gif" border=0 width="181" height="161" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 52 ><NOBR><div> A BRANCHED TRIGONAL MOLECULE</div> <div> MAKES AN OBLIQUE TRIGONAL</div> <div> TABLET SHAPED CRYSTAL</div> </NOBR></tD> <tD VALIGN=TOP WIDTH="241"><div> AN OVER ALL VIEW OF</div> <div> THE OBLIQUE TRIGONAL</div> <div>  TABLET SHAPED CRYSTAL</div> </tD> </tR> </TABLE></div> <div>     <A HREF="trigonal_crystals_m.htm" TITLE="TRIGONAL CRYSTALS"><U>BACK TO TOP</U></A></div> <bR> </td> </tr></table></body>