Adelite
A valid IMA mineral species - grandfathered
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About Adelite
Formula:
CaMg(AsO4)(OH)
Colour:
Colourless, white, grey, bluish grey, yellowish grey, yellow, pale green, pinkish brown, brown
Lustre:
Vitreous, Greasy
Hardness:
5
Specific Gravity:
3.71 - 3.76
Crystal System:
Orthorhombic
Member of:
Name:
Named by Hjalmar Sjögren in 1891 from the Greek ÎŹÎŽÎ·Î»ÎżÏ for "adelos," "obscure" or "indistinct", in reference to its lack of transparency.
Co-Type Localities:
Isostructural with:
Adelite-Descloizite Group. Adelite-Gottlobite Series.
The arsenate analogue of Gottlobite.
Crystal structure details (Effenberger et al., 2002): M2 site is Mg; there are (M2)O6 octahedra that share edges to form chains; the chains are parallel to [001]; two chains are linked via a tetrahedron to form 3D framework; in the framework there are cavities where the M1 site is located; in adelite it is Ca, with tetragonal antiprism coordination (slightly distorted).
See also the hydrated analogue camgasite.
The arsenate analogue of Gottlobite.
Crystal structure details (Effenberger et al., 2002): M2 site is Mg; there are (M2)O6 octahedra that share edges to form chains; the chains are parallel to [001]; two chains are linked via a tetrahedron to form 3D framework; in the framework there are cavities where the M1 site is located; in adelite it is Ca, with tetragonal antiprism coordination (slightly distorted).
See also the hydrated analogue camgasite.
Unique Identifiers
IMA Classification of Adelite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1891
Classification of Adelite
8.BH.35
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
41.5.1.1
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
20.2.17
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Ade | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Adelite
Vitreous, Greasy
Transparency:
Transparent, Translucent
Comment:
LĂ„ngban: vitrous to greasy
Colour:
Colourless, white, grey, bluish grey, yellowish grey, yellow, pale green, pinkish brown, brown
Comment:
Colourless in transmitted light.
Streak:
White
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.71 - 3.76 g/cm3 (Measured) 3.78 g/cm3 (Calculated)
Optical Data of Adelite
Type:
Biaxial (+)
RI values:
nα = 1.712 nβ = 1.721 nγ = 1.731
2V:
Measured: 68° to 90°
Birefringence:
0.019
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r
Optical Extinction:
Parallel. XYZ = acb
Pleochroism:
Non-pleochroic
Chemistry of Adelite
Mindat Formula:
CaMg(AsO4)(OH)
Common Impurities:
Pb,Mn,Na,Cu,Ba
Crystallography of Adelite
Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Setting:
P21 21 21
Cell Parameters:
a = 7.43 Å, b = 8.85 Å, c = 5.88 Å
Ratio:
a:b:c = 0.84 : 1 : 0.664
Unit Cell V:
386.64 Ă
Âł (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals elongated [100]. Commonly massive.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0012643 | Adelite | Effenberger H, Krause W, Bernhardt H J (2002) Structural investigations of adelite and cobaltaustinite, two members of the adelite-descloizite group Experimental Mineralogy, Petrology and Geochemistry Abstract Volume 9 30-30 | 2002 | Langban, Sweden | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.96 Ă | (60) |
4.48 Ă | (10) |
4.13 Ă | (70) |
3.47 Ă | (20) |
3.16 Ă | (100) |
2.98 Ă | (60) |
2.78 Ă | (60) |
2.64 Ă | (40) |
2.59 Ă | (70) |
2.51 Ă | (60) |
2.33 Ă | (70) |
2.03 Ă | (20) |
1.872 Ă | (20) |
1.819 Ă | (20) |
1.751 Ă | (10) |
1.724 Ă | (10) |
1.671 Ă | (10) |
1.609 Ă | (70) |
1.582 Ă | (10) |
1.505 Ă | (20) |
1.485 Ă | (10) |
1.349 Ă | (10) |
1.307 Ă | (30) |
1.220 Ă | (30) |
Comments:
ICDD 24-208. Langban, Sweden. Data from Canadian Mineralogist 18: 191 (1980)
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-đ alteration and/or metamorphism | |
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Geological Setting:
On willemite-franklinite ore from a metamorphosed stratiform zinc orebody (Franklin, New Jersey, USA).
Type Occurrence of Adelite
Co-Type Localities:
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden, number HS 6413.
Geological Setting of Type Material:
A rare mineral in a metamorphosed FeâMn orebody
Associated Minerals at Type Locality:
Reference:
Sjögren, H. (1891) Bidrag til Sveriges mineralogi. 3. Adelit, ett basiskt arseniat frÄn Nordmarken och LÄngban. Geologiska Föreningen i Stockholm Förhandlingar: 13: 781-796.
Other Language Names for Adelite
Varieties of Adelite
Relationship of Adelite to other Species
Member of:
Other Members of this group:
Arsendescloizite | PbZn(AsO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Austinite | CaZn(AsO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Äechite | PbFe2+(VO4)(OH) | Orth. mmm (2/m 2/m 2/m) |
Cobaltaustinite | CaCo(AsO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Conichalcite | CaCu(AsO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Descloizite | PbZn(VO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Pnma |
Duftite | PbCu(AsO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Duftite-alpha | PbCu(AsO4)(OH) | |
Gottlobite | CaMg(VO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Hermannroseite | CaCu(PO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Mottramite | PbCu(VO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Pnma |
Nickelaustinite | CaNi(AsO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Pyrobelonite | PbMn2+(VO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Pnma |
Tangeite | CaCu(VO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Unnamed (Pb-analogue of Nickelaustinite) | PbNi(AsO4)(OH) | |
Vuagnatite | CaAl(SiO4)(OH) | Orth. 2 2 2 : P21 21 21 |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
27 photos of Adelite associated with Franklinite | Zn2+Fe3+2O4 |
25 photos of Adelite associated with Willemite | Zn2SiO4 |
19 photos of Adelite associated with Zincite | ZnO |
18 photos of Adelite associated with Calcite | CaCO3 |
8 photos of Adelite associated with Magnetite | Fe2+Fe3+2O4 |
8 photos of Adelite associated with Magnussonite | Mn2+10(As3+O3)6(OH,Cl)2 |
7 photos of Adelite associated with Hausmannite | Mn2+Mn3+2O4 |
6 photos of Adelite associated with Sphalerite | ZnS |
4 photos of Adelite associated with Chlorophoenicite | (Mn,Mg)3Zn2(AsO4)(OH,O)6 |
3 photos of Adelite associated with Dolomite | CaMg(CO3)2 |
Related Minerals - Strunz-mindat Grouping
8.BH. | Crimsonite | PbFe3+2(PO4)2(OH)2 |
8.BH. | Reznitskyite | CaMg(VO4)F |
8.BH. | Cuprozheshengite | Pb4CuZn2(AsO4)2(PO4)2(OH)2 |
8.BH. | Zheshengite | Pb4ZnZn2(AsO4)2(PO4)2(OH)2 |
8.BH. | Peterchinite | Zn3Zn2(OH)6As[O3(OH)3] |
8.BH.05 | Thadeuite | Ca(Mg,Fe2+)3(PO4)2(OH,F)2 |
8.BH.10 | Durangite | NaAl(AsO4)F |
8.BH.10 | Isokite | CaMg(PO4)F |
8.BH.10 | Lacroixite | NaAl(PO4)F |
8.BH.10 | Maxwellite | NaFe3+(AsO4)F |
8.BH.10 | Panasqueiraite | CaMg(PO4)(OH,F) |
8.BH.10 | Kononovite | NaMg(SO4)F |
8.BH.10 | Arsenatrotitanite | NaTi(AsO4)O |
8.BH.15 | Drugmanite | Pb2(Fe3+,Al)(PO4)(PO3OH)(OH)2 |
8.BH.20 | Bjarebyite | (Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3 |
8.BH.20 | Cirrolite | Ca3Al2(PO4)3(OH)3 (?) |
8.BH.20 | Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 |
8.BH.20 | Penikisite | Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3 |
8.BH.20 | Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 |
8.BH.20 | Johntomaite | BaFe2+2Fe3+2(PO4)3(OH)3 |
8.BH.20 | Bjarebyite Group | |
8.BH.20 | Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 |
8.BH.20 | Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 |
8.BH.25 | Bertossaite | (Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4 |
8.BH.25 | Palermoite | (Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4 |
8.BH.25 | Natropalermoite | Na2SrAl4(PO4)4(OH)4 |
8.BH.30 | Carminite | PbFe3+2(AsO4)2(OH)2 |
8.BH.30 | Sewardite | CaFe3+2(AsO4)2(OH)2 |
8.BH.35 | Arsendescloizite | PbZn(AsO4)(OH) |
8.BH.35 | Austinite | CaZn(AsO4)(OH) |
8.BH.35 | Cobaltaustinite | CaCo(AsO4)(OH) |
8.BH.35 | Conichalcite | CaCu(AsO4)(OH) |
8.BH.35 | Duftite | PbCu(AsO4)(OH) |
8.BH.35 | Gabrielsonite | PbFe3+(As3+O3)O |
8.BH.35 | Nickelaustinite | CaNi(AsO4)(OH) |
8.BH.35 | Tangeite | CaCu(VO4)(OH) |
8.BH.35 | Duftite-alpha | PbCu(AsO4)(OH) |
8.BH.35 | Gottlobite | CaMg(VO4)(OH) |
8.BH.35 | Hermannroseite | CaCu(PO4)(OH) |
8.BH.40 | Äechite | PbFe2+(VO4)(OH) |
8.BH.40 | Descloizite | PbZn(VO4)(OH) |
8.BH.40 | Mottramite | PbCu(VO4)(OH) |
8.BH.40 | Pyrobelonite | PbMn2+(VO4)(OH) |
8.BH.40 | Khorixasite | (Bi0.67â»0.33)Cu(VO4)(OH) |
8.BH.45 | Bayldonite | PbCu3(AsO4)2(OH)2 |
8.BH.45 | Vésigniéite | BaCu3(VO4)2(OH)2 |
8.BH.50 | Paganoite | NiBi(AsO4)O |
8.BH.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 |
8.BH.55 | Jagowerite | BaAl2(PO4)2(OH)2 |
8.BH.60 | Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 |
8.BH.65 | Leningradite | PbCu3(VO4)2Cl |
8.BH.70 | Katiarsite | KTiO(AsO4) |
8.BH.70 | Yurgensonite | K2SnTiO2(AsO4)2 |
8.BH.75 | Melanarsite | K3Cu7Fe3+O4(AsO4)4 |
8.BH.80 | Moraskoite | Na2Mg(PO4)F |
8.BH.80 | Evseevite | Na2Mg(AsO4)F |
8.BH.85 | Piccoliite | NaCaMn3+2(AsO4)2O(OH) |
Fluorescence of Adelite
Not fluorescent.
Other Information
Notes:
Soluble in dilute acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Adelite
mindat.org URL:
https://www.mindat.org/min-23.html
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References for Adelite
Reference List:
Sjögren, Hj. (1891) Bidrag till Sveriges mineralogi 3. Geologiska Föreningen i Stockholm Förhandlingar, 13 (7) 781-796 doi:10.1080/11035899109445851
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin Vol. 679. US Geological Survey doi:10.3133/b679 p.35
Jambor, J. L., Owens, D. R., Dutrizac, J. E. (1980) Solid solution in the adelite group of arsenates. The Canadian Mineralogist, 18 (2) 191-195
Localities for Adelite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Algeria | |
| Byramjee R.and Meindre M. (1956) |
Germany | |
| |
| Mandarino (2001) |
Italy | |
| www.socgeol.it (n.d.) +3 other references |
North Macedonia | |
| Ermolaeva et al. (2019) |
Sweden | |
| Holtstam et al. (1999) |
| Sjögren (1891) |
Blatter (2003) | |
+2 other references | |
Adolfsson (1979) | |
Strand (2014) | |
| RRUFF ID: R060687 +2 other references |
Gatedal (n.d.) +1 other reference | |
| Sjögren (1891) +1 other reference |
Palache et al. (1951) | |
| Nysten (2004) |
USA | |
| Mineralogical Record:13:37 +1 other reference |
| Mineral News: 19 (12) |
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LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, Sweden