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Adelite

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Squaw Creek Mine, Taylor Creek Tin District (Black Range Tin District), Sierra Co., New Mexico, USA

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Formula:
CaMg(AsO
 
4
)(OH)
System:OrthorhombicColour:Colorless, white, gray, ...
Lustre:ResinousHardness:5
Member of:Adelite-Descloizite Group
Name:Named by Hjalmar Sjögren in 1891 from the Greek άδηλος for "adelos," obscure or indistinct, in reference to its lack of transparency.
Isostructural with:Gottlobite


Adelite-Descloizite Group. Adelite-Gottlobite Series. The arsenate analogue of Gottlobite.

Classification of Adelite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1891
Strunz 8th edition ID:7/B.26-10
Strunz 9th edition ID:8.BH.35
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:41.5.1.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Hey's CIM Ref.:20.2.17

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
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Type Occurrence of Adelite

Co-type Localities:Långban, Filipstad, Värmland, Sweden
Kittel Mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden
Year of Discovery:1891
Geological Setting of type material:A rare mineral in a metamorphosed Fe–Mn orebody
Associated Minerals at type locality:
SarkiniteHedyphaneFredrikssoniteBrauniteArsenoclasite

Occurrences of Adelite

Geological Setting:On willemite-franklinite ore from a metamorphosed stratiform zinc orebody (Franklin, New Jersey, USA).

Physical Properties of Adelite

Lustre:Resinous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colorless, white, gray, bluish gray, yellowish gray, yellow, pale green, pinkish brown, brown
Comment:colorless in transmitted light
Streak:White
Hardness (Mohs):5
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Conchoidal
Density (measured):3.71 - 3.76 g/cm3
Density (calculated):3.78 g/cm3

Crystallography of Adelite

Crystal System:Orthorhombic
Class (H-M):2 2 2 - Disphenoidal
Space Group:P21 21 21
Space Group Setting:P21 21 21
Cell Parameters:a = 7.43Å, b = 8.85Å, c = 5.88Å
Ratio:a:b:c = 0.84 : 1 : 0.664
Unit Cell Volume:V 386.64 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals elongated [100]. Commonly massive.
X-Ray Powder Diffraction:
d-spacingIntensity
4.96 (60)
4.13 (70)
3.16 (100)
2.98 (60)
2.78 (60)
2.59 (70)
2.33 (70)
1.609 (70)
Comments:Canadian Mineralogist 18: 191 (1980)

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
Maximum Birefringence:δ = 0.019

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r
Optical Extinction:Parallel. XYZ = acb
Pleochroism:Non-pleochroic

Chemical Properties of Adelite

Formula:
CaMg(AsO
 
4
)(OH)
Essential elements:As, Ca, H, Mg, O
All elements listed in formula:As, Ca, H, Mg, O

Relationship of Adelite to other Species

Series:Forms a series with Gottlobite (see here)
Member of:Adelite-Descloizite Group
Other Members of Group:

- +
Arsendescloizite
PbZn(AsO
 
4
)(OH)
Austinite
CaZn(AsO
 
4
)(OH)
Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
Cobaltaustinite
CaCo(AsO
 
4
)(OH)
Conichalcite
CaCu(AsO
 
4
)(OH)
Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
Duftite
PbCu(AsO
 
4
)(OH)
Gabrielsonite
PbFe(AsO
 
4
)(OH)
Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
Hermannroseite
CaCu(PO
 
4
)(OH)
Mottramite
PbCu(VO
 
4
)(OH)
Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
Tangeite
CaCu(VO
 
4
)(OH)
Common Associates:
ZinciteWillemiteSphaleriteRhodochrositeMagnetite
MagnetiteKraissliteHausmanniteFrankliniteBaryte
Allactite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BH.05Thadeuite
Ca(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,F)
 
2
8.BH.10Durangite
NaAl(AsO
 
4
)F
8.BH.10Isokite
CaMg(PO
 
4
)F
8.BH.10Lacroixite
NaAl(PO
 
4
)F
8.BH.10Maxwellite
NaFe
3+
 
(AsO
 
4
)F
8.BH.10Panasqueiraite
CaMg(PO
 
4
)(OH,F)
8.BH.10Tilasite
CaMg(AsO
 
4
)F
8.BH.15Drugmanite
Pb(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.20Bjarebyite
(Ba,Sr)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Cirrolite
Ca
 
3
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
 (?)
8.BH.20Kulanite
Ba(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Penikisite
Ba(Mg,Fe
2+
 
,Ca)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Perloffite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Johntomaite
BaFe
2+
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.25Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
4
(OH,F)
 
4
8.BH.25Palermoite
(Li,Na)
 
2
(Sr,Ca)Al
 
4
(PO
 
4
)
 
4
(OH)
 
4
8.BH.30Carminite
PbFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.30Sewardite
CaFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.35Arsendescloizite
PbZn(AsO
 
4
)(OH)
8.BH.35Austinite
CaZn(AsO
 
4
)(OH)
8.BH.35Cobaltaustinite
CaCo(AsO
 
4
)(OH)
8.BH.35Conichalcite
CaCu(AsO
 
4
)(OH)
8.BH.35Duftite
PbCu(AsO
 
4
)(OH)
8.BH.35Gabrielsonite
PbFe(AsO
 
4
)(OH)
8.BH.35Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
8.BH.35Tangeite
CaCu(VO
 
4
)(OH)
8.BH.35Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
8.BH.35Hermannroseite
CaCu(PO
 
4
)(OH)
8.BH.40Čechite
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
8.BH.40Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
8.BH.40Mottramite
PbCu(VO
 
4
)(OH)
8.BH.40Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
8.BH.45Bayldonite
PbCu
 
3
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.45Vésigniéite
BaCu
 
3
(VO
 
4
)
 
2
(OH)
 
2
8.BH.50Paganoite
NiBi(AsO
 
4
)O
8.BH.55Jagowerite
BaAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.55Carlgieseckeite-(Nd)
NaNdCa
 
3
(PO
 
4
)
 
3
F
8.BH.60Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
(HPO
 
4
,PO
 
4
)
 
3
(SiO
 
4
,PO
 
4
)(OH)
 
4
8.BH.65Leningradite
PbCu
 
3
(VO
 
4
)
 
2
Cl
Related Minerals - Hey's Index Grouping:

- +
20.2.1Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
20.2.2Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
20.2.3Rösslerite
Mg(HAsO
 
4
) · 7H
 
2
O
20.2.4Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.2.5Weilite
Ca(HAsO
 
4
)
20.2.6Johnbaumite
Ca
 
5
(AsO
 
4
)
 
3
OH
20.2.7Haidingerite
CaHAsO
 
4
 · H
 
2
O
20.2.8Pharmacolite
Ca(HAsO
 
4
) · 2H
 
2
O
20.2.9Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
20.2.10Vladimirite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 5H
 
2
O
20.2.11Guérinite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
20.2.12Ferrarisite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
20.2.13Rauenthalite
Ca
 
3
(AsO
 
4
)
 
2
 · 10H
 
2
O
20.2.14Phaunouxite
Ca
 
3
(AsO
 
4
)
 
2
 · 11H
 
2
O
20.2.15Mcnearite
NaCa
 
5
(AsO
 
4
)(HAsO
 
4
)
 
4
 · 4H
 
2
O
20.2.16Bergslagite
CaBeAsO
 
4
(OH)
20.2.18Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
 · 2H
 
2
O
20.2.19Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
20.2.20Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
20.2.21Picropharmacolite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 11H
 
2
O
20.2.22Bariopharmacosiderite
Ba
 
0.5
Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 5H
 
2
O

Other Names for Adelite

Other Languages:
German:Adelit
Italian:Adelite
Latvian:Adelīts
Russian:Аделит
Spanish:Adelita
Varieties:
Vanadian Adelite

Other Information

Fluorescence in UV light:Not fluorescent.
Other Information:Soluble in dilute acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Adelite

Reference List:

- +
Sjögren, H. (1891): Bidrag til Sveriges mineralogi. 3. Adelit, ett basiskt arseniat från Nordmarken och Långban. Geologiska Föreningen i Stockholm Förhandlingar. 13: 781-796

Sjögren (1893) Bull. Geol. Inst. Upsala: 1: 56.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 35.

Aminoff (1933) Kungl. Svenska Vetenskap., Handl. [3]: 11, no. 4: 24.

Hägele (1939) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart, Beil.-Bd.: 75: 101.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 804-806.

Arkiv för Mineralogi och Geologi (1968): 4: 499. [Recent / Best, Chemistry, Optics]

Canadian Mineralogist (1980): 18: 191.

Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 3.

Effenberger, H., Krause, W., and Bernhardt, H.-J. (2002) Structural investigation of adelite and cobaltaustinite, two members of the Adelite-descloizite Group. EMPG IX, Ninth International Symposium on Experimental Mineralogy, Petrology and Geochemistry, Zürich, Switzerland, 24.-27.3, Book of Abstratcs (2002), 30.

Internet Links for Adelite

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    • Localities for Adelite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Lower Saxony
      • Harz
        • St Andreasberg District
    		No reference listed
    • Thuringia
      • Thuringian Forest
        • Friedrichroda
          • Gottlob Hill
    		[var: Vanadian Adelite] [MinRec 32:417]
    Sweden
     
    • Värmland
      • Filipstad
    		Holtstam, D. & J. Langhof, eds. (1999): Långban: The mines, their minerals, geology and explorers. Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, p. 89-90.
    Sjögren, H. (1891): Bidrag til Sveriges mineralogi. 3. Adelit, ett basiskt arseniat från Nordmarken och Långban. Geologiska Föreningen i Stockholm Förhandlingar. 13: 781-796
    Adolfsson, S. G. (1979): Notes on Recent Underground Collecting at Långban. Mineralogical Record. 10: 215-217
        • Nordmark (Nordmarksberg)
    		Kjell Gatedal
    Sjögren, H. (1891): Bidrag til Sveriges mineralogi. 3. Adelit, ett basiskt arseniat från Nordmarken och Långban. Geologiska Föreningen i Stockholm Förhandlingar. 13: 781-796; Mineralogical Magazine (1998) 62 (3), 395-407
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 806.
        • Persberg district
          • Pajsberg
    		Nysten, P. (2004): Harstigen ett mineralogisk eldorado i Bergslagen. Norsk Bergverksmuseum Skrift 28: 5-13
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Dunn, P.J.: Contributions to the mineralogy of Franklin and Sterling Hill, NJ: Min. Rec.:10:160-165 (1979); Dunn(1995):Pt5:655.
          • Ogdensburg
            • Sterling Hill
    		Min. Rec.:13:37; Dunn(1995):Pt5:655.
    • Utah
      • Tooele Co.
        • Oquirrh Mts
          • Mercur District (Camp Floyd District)
    		Mineral News: 19(12): 1, 3.
    Mineral and/or Locality
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