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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Melilite

A synonym of Melilite Group
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Formula:
Ca2(Al,Mg,Fe)((Al,Si,B)SiO7)
Hardness:
5 - 5½
Crystal System:
Tetragonal
Synonym:
A synonym of Melilite Group
Melilite was originally described in 1796 from Capo di Bove, Alban Hills, Rome Province, Latium, Italy. The name refers to a group of minerals (melilite group) with chemically similar composition, nearly always minerals in åkermanite-gehlenite series.

For references see Melilite Group.


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Unique IdentifiersHide

Mindat ID:
2635 (as Melilite)
29310 (as Melilite Group)
Long-form identifier:
mindat:1:1:2635:8 (as Melilite)
mindat:1:1:29310:1 (as Melilite Group)

Similar NamesHide

MeliniteA synonym of 'Bole'
MelliteA valid IMA mineral species - grandfatheredAl2[C6(COO)6] · 16H2O
MeniliteA rock subtype

Internet Links for MeliliteHide

References for MeliliteHide

Reference List:
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