boracite
Americannoun
noun
Etymology
Origin of boracite
Example Sentences
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Tetrahedrite, blende, diamond, boracite and pharmacosiderite are substances which crystallize in this class.
From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various
In boracite there are four uniterminal triad axes, and the faces of the two tetrahedra perpendicular to them will bear opposite charges.
From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various
Various explanations have been offered to account for these “optical anomalies” of boracite.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" by Various
It occurs in nature also in boracite, datolite, tourmaline, and some other minerals.
From Webster's Unabridged Dictionary (2nd 100 Pages) by Noah Webster
Chemically, boracite is a magnesium borate and chloride with the formula Mg7Cl2B16O30—A small amount of iron is sometimes present, and an iron-boracite with half the magnesium replaced by ferrous iron has been called huyssenite.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" by Various
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