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425:(2). If (aqueous?) solution containing two such isomorphic compound together, is crystallized, a "mixed-crystal" appears, that contains atoms from both-the compound. The shape-of the obtained mixed-crystal, is same as the shape of crystal of any of the two pure compounds. If the solution is saturated with only one-of the compounds, both the compounds crystallized together, and must form homogeneous mixed crystal.
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In 2 isomorphic compounds differing in one component (say A and B respectively), If we can know the valency of the one ( say A) , the valency of the related element(B) in the other compound, could be assumed same as the other(A) by-default, since in isomorphic crystal atoms assumed to be connected
428:(3). If in a saturated or supersaturated solution of one-such pure compound; a small crystal of another-such compound is added, it will be able to initiate crystallization, and on the added-crystal of second-compound, uniform "overgrowth" will be seen by accumulation of first compound from solution.
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If crystals of more than one different (electrovalent?) compounds, show similar shape of crystal (same number of plane-surface, and exact equal angles at respective corners), then the crystals may- be called isomorphic crystals, and the property of those compounds (for-which the somehow forms
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An old school-chemistry textbook (of 1979) at my home (by āĻ°āĻŖāĻāĻŋāĻ¤ āĻĻāĻžāĻ¸ (Dr. Ranajit Das)) , provides a topic on
Mitscherlich's law of crystal isomorphism, and one of its application, in a stoichiometry chapter (Rajarshi Rit 13:56, 14 January 2016 (UTC))
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However the external, superficial similarity in shape is not the only-criterion to tell the crystals isomorphic. With totally following external similarity, if the crystals the three more following criteria, they would be called isomorphic.
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in same way. e.g. Zinc oxide and
Beryllium oxide crystals are isomorphic. If we could determine formula of zink oxide is ZnO, with valency of Zn=2, then we can predict the formula of Beryllium oxide is BeO with valency of Be = 2.
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The law indicates, in a set of such-crystals, the nature of crystal is not varying upon chemical-nature of the components. Instead they depends only-upon number and position of atoms. They have similar chemical formula.
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Suppose two isomorphic compounds differ only in the elements A and B, and the elements have atomic weights, a and b respectively. If we somehow come-to-know the values of how-many-gram of A (suppose W
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Notes: (1). External shape of crystals of common-salt and diamond is similar. Yet they are not isomorphic because they do not follow other criteria such as mixed-crystal formation, overgrowth etc.
272:, an attempt at creating a standardized, informative, comprehensive and easy-to-use rocks and minerals resource. If you would like to participate, you can choose to edit this article, or visit the
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In other hand, in 2 different compounds (if forming isomorphic crystals) differing in 1 component, ensures us, same-ânumberâ of atoms. This property is used to determine atomic weights.
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Rajarshi Rit 10:29, 14 January 2016 (UTC) Rajarshi Rit 10:33, 14 January 2016 (UTC)Rajarshi Rit 10:34, 14 January 2016 (UTC) Rajarshi Rit 10:36, 14 January 2016 (UTC)
422:(1). Two isomorphic crystals must show a similar-pattern of chemical formula, i.e. same-number of atoms (of separate elements) would compose the chemical formula.
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It may be near-impossible to cross-check an old, local school-chemistry book. However experts on
Knowledge (XXG) could found-out further informations. Thanks.
550:; if we could know the value of atomic weight of any 1 element (Say A having at. Wt. =a), we can calculate another element (B)âs atomic wt (b). as follows:
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621:(2). In reverse; there are cases where the compounds behave as isomorphic, yet the number of atoms are not same, however , composition is similar. E.g. K
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After studying various crystals, a scientist, Mitscherlich discovered a rule (called
Mitscherlichâs law for isomorphic crystals), that states;
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553:((( this part of document modified because in original document it seemed unclear.))) (Rajarshi Rit 13:56, 14 January 2016 (UTC))
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on
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Reference: āĻāĻā§āĻāĻŽāĻžāĻ§ā§āĻ¯āĻŽāĻŋāĻ āĻ°āĻ¸āĻžāĻ¯āĻŧāĻ¨/ āĻĄ. āĻ°āĻŖāĻāĻŋāĻ¤ āĻĻāĻžāĻ¸ / ā§§āĻŽ āĻāĻŖā§āĻĄ / ā§ĢāĻŽ āĻ¸āĻāĻ¸ā§āĻāĻ°āĻŖ (ā§§ā§¯ā§ā§Ŧ)/ āĻāĻ°āĻŋāĻ¯āĻŧā§āĻ¨ā§āĻāĻžāĻ˛ āĻŦā§āĻ āĻā§āĻŽā§āĻĒāĻžāĻ¨ā§
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No. of atoms of A in 1st crystal = No. of atoms of B in 2nd crystal (having replaceable amount of B).
502:âĻ(for say, Zink sulfate, Magnesium sulfate, Ferrous sulfate follows all-4 criteria. Such as âĻ âĻ âĻ )
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gram of B contains the same number of atoms (only because the 2 crystals known as isomorphic).
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Iâve translated it into
English (because the article was in Bengali), & slightly simplified.
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resource. If you would like to participate, you can choose to edit this article, or visit the
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It says, the law is used as a method for determining the atomic weight of elements.
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Mitscherlich's
Isomorphism-Law in determination of atomic weight:
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Mitscherlichâs
Isomorphism-Law in determination of Valency:
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If recovered, it may contribute to an improved article. â
535:) (of second compound); we can tell W1 gram of A and W
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pages on
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