alunite

[ al-yuh-nahyt ]

/ ˈæl yəˌnaɪt /

Save This Word!

noun

a mineral, a hydrous sulfate of potassium and aluminum, KAl3(SO4)2(OH)6, commonly occurring in fine-grained masses.

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?

Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

TAKE THE QUIZ TO FIND OUT

Also called al·um·stone

[al-uhm-stohn]. /ˈæl əmˌstoʊn/.

Origin of alunite

1865–70; <French alun (<Latin alūmenalum¹) + -ite¹

Words nearby alunite

alumnus, alumnx, Alum Rock, alumroot, Alundum, alunite, alunogen, alure, alutaceous, al-ʿUzza, Alva

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use alunite in a sentence

Alunite, al′un-īt, n. a mineral consisting of common alum together with normal hydrate of aluminium.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)|Various
Alum-rock, or alum-stone, is a species of impure alunite, and is not of very common occurrence.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
In the Goldfield camp (p. 230) the ores are closely associated with alunite in such a manner as to suggest a common origin.
The Economic Aspect of Geology|C. K. Leith
Alunite is a potassium-aluminum sulphate, which differs from sericite in that sulphur takes the place of silicon.
The Economic Aspect of Geology|C. K. Leith

Alunite occurs as veins and replacement deposits, often in igneous associations, and is supposed to be of igneous source.
The Economic Aspect of Geology|C. K. Leith

British Dictionary definitions for alunite

alunite

/ (ˈæljʊˌnaɪt) /

noun

a white, grey, or reddish mineral consisting of hydrated aluminium sulphate. It occurs in volcanic igneous rocks and is a source of potassium and aluminium compounds. Formula: KAl 3 (SO 4) 2 (OH) 6

Word Origin for alunite

C19: from French alun alum (from Latin alūmen) + -ite 1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012