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1. TiO2 and MnO2 belong to the same isomorphic
group in the oxide class and therefore isomorphic
MgCO3 and ZnCO3 belong to the
same isomorphic group in the carbonate class "
" "
CaSO4 and PbSO4 "
" " "
" "
" " sulfate
" " "
".
NaNO3 is isomorphic with MgCO3
and ZnCO3 but do not belong to the same isomorphic group
since they are not in the same mineral class-the
same is true for CaWO4 and PbMoO4
2. No. if ions cannot adequately substitute
ionically between isomorphic minerals, solid solution cannot
exist. You should apply the
factors which govern ionic substitution
3. a. reconstructive b. enantiotropic
and displacive c. monotropic
4. a. manganoan hornblende b. ferrian
tourmaline c. aluminian augite
5. 27%, 13%, and since the 800 degree form would have more
Fe, it would be darker in color
6. a. molybdate b.
phosphate c. sulfide d.
arsenate e. nitrate 7. end members =
albite (Ab) and anorthite (An). Minerals with different amounts of
An and Ab
form because at different
temperatures of formation there is different amounts of Ca+2
and
Na+1 ionically
substituting for each other in the structure simultaneously with Al+3
and Si+4
to keep electroneutrality in the
mineral
8. mineral class = based on anion,
anionic complex or lack of an ion
mineral subclass
= based on special chemical bonding or structural linkages of the
mineral's
building block
mineral groups =
based on the same atomic structure but different chemical composition,
same chemical composition but different atomic structure, or based on the
same general formula
mineral series =
based on minerals with end members, some of the elements of which
substitute
ionically in proportion to temperature forming a series of
minerals
mineral variety =
based on unusual amounts of chemical constituents or based on crystal size
or appearance
Match left column with right
column |
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| 1. d |
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| 2. l |
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| 3. b |
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| 4. i |
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| 5. f, j |
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| 6. c |
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| 7. e |
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| 8. a |
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| 9. k |
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| 10.h |
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