different between lanthanum vs feklichevite

English

Alternative forms

• lantanium (obsolete)
• lanthanium (obsolete)

Etymology

From Ancient Greek ??????? (lanthán?, “to escape notice”) +? -um (“a chemical element”), because it had gone long undetected in mineral ores.

Pronunciation

• enPR: l?n'th?n?m, IPA^(key): /?læn??n?m/

Noun

lanthanum (countable and uncountable, plural lanthanums)

1. (uncountable) A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
2. (countable) An atom of this element.

Synonyms

• La

Derived terms

Related terms

Translations

See also

• Fosrenol
• rare earth

Latin

Pronunciation

• (Classical) IPA^(key): /?lan.t?a.num/, [???än?t??än???]
• (Ecclesiastical) IPA^(key): /?lan.ta.num/, [?l?n?t??num]

Noun

lanthanum n (genitive lanthan?); second declension

1. lanthanum

Declension

Second-declension noun (neuter).

Limburgish

Pronunciation

• IPA^(key): [l??n?ða??n??m]

Noun

lanthanum n

1. (uncountable) lanthanum
2. A part of lanthanum

Inflection

English

Etymology

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

? + -ite

Noun

feklichevite

1. (mineralogy) A trigonal-ditrigonal pyramidal mineral containing calcium, cerium, chlorine, fluorine, hafnium, hydrogen, iron, lanthanum, manganese, niobium, oxygen, silicon, sodium, strontium, titanium, and zirconium.

References

• David Barthelmy (1997–2021) , “Feklichevite”, in Webmineral Mineralogy Database