Mineralogy Database

Chiavennite Mineral Data

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General Chiavennite Information

Help on Chemical  Formula: Chemical Formula: CaMnBe2Si5O13(OH)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 531.51 gm
   Calcium     7.54 %  Ca   10.55 % CaO
   Manganese  10.34 %  Mn   13.35 % MnO
   Beryllium   3.39 %  Be    9.41 % BeO
   Silicon    26.42 %  Si   56.52 % SiO2
   Hydrogen    1.14 %  H    10.17 % H2O
   Oxygen     51.17 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMn2+Be2Si5O13(OH)2•2(H2O)
Help on Environment: Environment: Coating beryl in late-stage pegmatites (Tanno, Italy); in vugs in syenite pegmatites (Norway).
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: From Tanno, Chiavenna, Lombardy, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 80917
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