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        <isotope mass="156.9239601" neutronsnum="157" name="Gadolinium-157"/>
        <isotope mass="157.9241039" neutronsnum="158" name="Gadolinium-158"/>
        <isotope mass="159.9270541" neutronsnum="160" name="Gadolinium-160"/>
    </element>
    <element mass="158.92535" atomicnumber="65" symbol="Tb" name="Terbium">
        <isotope mass="158.9253468" neutronsnum="159" name="Terbium-159"/>
    </element>
    <element mass="162.5" atomicnumber="66" symbol="Dy" name="Dysprosium">
        <isotope mass="155.924283" neutronsnum="156" name="Dysprosium-156"/>
        <isotope mass="157.924409" neutronsnum="158" name="Dysprosium-158"/>
        <isotope mass="159.9251975" neutronsnum="160" name="Dysprosium-160"/>
        <isotope mass="160.9269334" neutronsnum="161" name="Dysprosium-161"/>
        <isotope mass="161.9267984" neutronsnum="162" name="Dysprosium-162"/>
        <isotope mass="162.9287312" neutronsnum="163" name="Dysprosium-163"/>
        <isotope mass="163.9291748" neutronsnum="164" name="Dysprosium-164"/>
    </element>
    <element mass="164.93032" atomicnumber="67" symbol="Ho" name="Holmium">
        <isotope mass="164.9303221" neutronsnum="165" name="Holmium-165"/>
    </element>
    <element mass="167.259" atomicnumber="68" symbol="Er" name="Erbium">
        <isotope mass="161.928778" neutronsnum="162" name="Erbium-162"/>
        <isotope mass="163.9292" neutronsnum="164" name="Erbium-164"/>
        <isotope mass="165.9302931" neutronsnum="166" name="Erbium-166"/>
        <isotope mass="166.9320482" neutronsnum="167" name="Erbium-167"/>
        <isotope mass="167.9323702" neutronsnum="168" name="Erbium-168"/>
        <isotope mass="169.9354643" neutronsnum="170" name="Erbium-170"/>
    </element>
    <element mass="168.93421" atomicnumber="69" symbol="Tm" name="Thulium">
        <isotope mass="168.9342133" neutronsnum="169" name="Thulium-169"/>
    </element>
    <element mass="173.054" atomicnumber="70" symbol="Yb" name="Ytterbium">
        <isotope mass="167.933897" neutronsnum="168" name="Ytterbium-168"/>
        <isotope mass="169.9347618" neutronsnum="170" name="Ytterbium-170"/>
        <isotope mass="170.9363258" neutronsnum="171" name="Ytterbium-171"/>
        <isotope mass="171.9363815" neutronsnum="172" name="Ytterbium-172"/>
        <isotope mass="172.9382108" neutronsnum="173" name="Ytterbium-173"/>
        <isotope mass="173.9388621" neutronsnum="174" name="Ytterbium-174"/>
        <isotope mass="175.9425717" neutronsnum="176" name="Ytterbium-176"/>
    </element>
    <element mass="174.9668" atomicnumber="71" symbol="Lu" name="Lutetium">
        <isotope mass="174.9407718" neutronsnum="175" name="Lutetium-175"/>
        <isotope mass="175.9426863" neutronsnum="176" name="Lutetium-176"/>
    </element>
    <element mass="178.49" atomicnumber="72" symbol="Hf" name="Hafnium">
        <isotope mass="173.940046" neutronsnum="174" name="Hafnium-174"/>
        <isotope mass="175.9414086" neutronsnum="176" name="Hafnium-176"/>
        <isotope mass="176.9432207" neutronsnum="177" name="Hafnium-177"/>
        <isotope mass="177.9436988" neutronsnum="178" name="Hafnium-178"/>
        <isotope mass="178.9458161" neutronsnum="179" name="Hafnium-179"/>
        <isotope mass="179.94655" neutronsnum="180" name="Hafnium-180"/>
    </element>
    <element mass="180.94788" atomicnumber="73" symbol="Ta" name="Tantalum">
        <isotope mass="179.9474648" neutronsnum="180" name="Tantalum-180"/>
        <isotope mass="180.9479958" neutronsnum="181" name="Tantalum-181"/>
    </element>
    <element mass="183.84" atomicnumber="74" symbol="W" name="Tungsten">
        <isotope mass="179.946704" neutronsnum="180" name="Tungsten-180"/>
        <isotope mass="181.9482042" neutronsnum="182" name="Tungsten-182"/>
        <isotope mass="182.950223" neutronsnum="183" name="Tungsten-183"/>
        <isotope mass="183.9509312" neutronsnum="184" name="Tungsten-184"/>
        <isotope mass="185.9543641" neutronsnum="186" name="Tungsten-186"/>
    </element>
    <element mass="186.207" atomicnumber="75" symbol="Re" name="Rhenium">
        <isotope mass="184.952955" neutronsnum="185" name="Rhenium-185"/>
        <isotope mass="186.9557531" neutronsnum="187" name="Rhenium-187"/>
    </element>
    <element mass="190.23" atomicnumber="76" symbol="Os" name="Osmium">
        <isotope mass="183.9524891" neutronsnum="184" name="Osmium-184"/>
        <isotope mass="185.9538382" neutronsnum="186" name="Osmium-186"/>
        <isotope mass="186.9557505" neutronsnum="187" name="Osmium-187"/>
        <isotope mass="187.9558382" neutronsnum="188" name="Osmium-188"/>
        <isotope mass="188.9581475" neutronsnum="189" name="Osmium-189"/>
        <isotope mass="189.958447" neutronsnum="190" name="Osmium-190"/>
        <isotope mass="191.9614807" neutronsnum="192" name="Osmium-192"/>
    </element>
    <element mass="192.217" atomicnumber="77" symbol="Ir" name="Iridium">
        <isotope mass="190.960594" neutronsnum="191" name="Iridium-191"/>
        <isotope mass="192.9629264" neutronsnum="193" name="Iridium-193"/>
    </element>
    <element mass="195.084" atomicnumber="78" symbol="Pt" name="Platinum">
        <isotope mass="189.959932" neutronsnum="190" name="Platinum-190"/>
        <isotope mass="191.961038" neutronsnum="192" name="Platinum-192"/>
        <isotope mass="193.9626803" neutronsnum="194" name="Platinum-194"/>
        <isotope mass="194.9647911" neutronsnum="195" name="Platinum-195"/>
        <isotope mass="195.9649515" neutronsnum="196" name="Platinum-196"/>
        <isotope mass="197.967893" neutronsnum="198" name="Platinum-198"/>
    </element>
    <element mass="196.966569" atomicnumber="79" symbol="Au" name="Gold">
        <isotope mass="196.9665687" neutronsnum="197" name="Gold-197"/>
    </element>
    <element mass="200.59" atomicnumber="80" symbol="Hg" name="Mercury">
        <isotope mass="195.965833" neutronsnum="196" name="Mercury-196"/>
        <isotope mass="197.966769" neutronsnum="198" name="Mercury-198"/>
        <isotope mass="198.9682799" neutronsnum="199" name="Mercury-199"/>
        <isotope mass="199.968326" neutronsnum="200" name="Mercury-200"/>
        <isotope mass="200.9703023" neutronsnum="201" name="Mercury-201"/>
        <isotope mass="201.970643" neutronsnum="202" name="Mercury-202"/>
        <isotope mass="203.9734939" neutronsnum="204" name="Mercury-204"/>
    </element>
    <element mass="204.3833" atomicnumber="81" symbol="Tl" name="Thallium">
        <isotope mass="202.9723442" neutronsnum="203" name="Thallium-203"/>
        <isotope mass="204.9744275" neutronsnum="205" name="Thallium-205"/>
    </element>
    <element mass="207.2" atomicnumber="82" symbol="Pb" name="Lead">
        <isotope mass="203.9730436" neutronsnum="204" name="Lead-204"/>
        <isotope mass="205.9744653" neutronsnum="206" name="Lead-206"/>
        <isotope mass="206.9758969" neutronsnum="207" name="Lead-207"/>
        <isotope mass="207.9766521" neutronsnum="208" name="Lead-208"/>
    </element>
</ns2:elements>
