Pinkish crystal aggregates of adelite from the Franklin deposit in Ogdensburg, New Jersey
General
Category
Adelite-descloizite group
Formula (repeating unit)
CaMg(AsO4)(OH)
IMA symbol
Ade[1]
Strunz classification
8.BH.35
Dana classification
41.5.1.1
Crystal system
Orthorhombic
Crystal class
2 2 2 – Disphenoidal
Space group
P212121
Identification
Color
Colourless, white, grey, bluish grey, yellowish grey, yellow, pale green, pinkish brown, brown
Crystal habit
Elongate crystals, massive
Cleavage
None observed
Mohs scale hardness
5
Luster
Vitreous, greasy
Diaphaneity
Transparent, translucent
Specific gravity
3.73 to 3.79
Optical properties
Biaxial (+), colorless (transmitted light)
References
[2]
The rare mineral adelite, is a calcium, magnesium, arsenate with chemical formula CaMgAsO4OH. It forms a solid solution series with the vanadium-bearing mineral gottlobite. Various transition metals substitute for magnesium and lead replaces calcium leading to a variety of similar minerals in the adelite–duftite group.
Adelite forms variably colored (blue, green, yellow and grey) crystals in the orthorhombic crystal system. The form is typically massive. It has a Mohs hardness rating of 5 and a specific gravity of 3.73 to 3.79.
It was first described in 1891 from Värmland, Sweden. Its name comes from the Greek word for indistinct.
The rare mineral adelite, is a calcium, magnesium, arsenate with chemical formula CaMgAsO4OH. It forms a solid solution series with the vanadium-bearing...
Austinite is a member of the adelite-descloizite group, adelite subgroup, the zinc (Zn) end member of the copper-Zn series with conichalcite. It is the...
is green and often forms botryoidal aggregates. It is a member of the adelite-descloizite Group, Conichalcite-Duftite Series. Duftite and conichalcite...
mottramite, typically with acicular habit. Mottramite is a member of the adelite-descloizite group. Mottramite, which is a copper rich member, forms a series...
Vuagnatite is a member of the adelite-descloizite group which was named after Prof. Dr. Marc Bernard Vuagnat. Its type locality is in Turkey, at Bögürtlencik...
a solid solution with adelite, which is an end member composition of CaMg(VO4)(OH), as well as being classified in the adelite group. Gottlobite is also...
population." According to Leo Africanus (1526) and George Sale (1760), the Adelites were of a tawny brown or olive complexion on the northern littoral, and...
first description was published in 1982. Arsendescloizite belongs to the adelite-descloizite group. It is the arsenate analog of the lead-zinc vanadate...
acutitarsella and P. gigas. P. acutitarsellus was later transferred to Adelites. Prophalonia was established in the Tortricidae and later transferred to...
millimetres (0.20 in). Arsenoclasite has been found in association with adelite, allactite, barite, calcite, dolomite, gatehouseite, hausmannite, hematite...
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