1) Borate mineral 2) Magnesium mineral
Found on
https://www.crosswordclues.com/clue/ludwigite
Ludwigite is a magnesium-iron borate mineral: Mg2FeBO5. Ludwigite typically occurs in magnesian iron skarn and other high temperature contact metamorphic deposits. It occurs in association with magnetite, forsterite, clinohumite and the borates vonsenite and szaibelyite. It forma a solid solution series with the iron(II)-iron(III) borate mineral v...
Found on
http://en.wikipedia.org/wiki/Ludwigite
• (n.) A borate of iron and magnesia, occurring in fibrous masses of a blackish green color.
Found on
http://thinkexist.com/dictionary/meaning/ludwigite/
(from the article `borate mineral`) ...Compounds of this type contain both BO3 triangular units and SiO4 tetrahedral units. Among the borate minerals associated with metamorphosed ...
Found on
http://www.britannica.com/eb/a-z/l/81
Lud'wig·ite noun [ Named after the chemist
Ludwig .]
(Min.) A borate of iron and magnesia, occurring in fibrous masses of a blackish green color.
Found on
http://www.encyclo.co.uk/webster/L/67
Ludwigite, named after the chemist Ernst Ludwig, is a rare mineral, a borate of iron and magnesia, occurring in fibrous masses of a blackish-green colour.
Found on
http://www.probertencyclopaedia.com/browse/HL.HTM
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