Adelite Mineral Data

General Adelite Information

Chemical Formula:

CaMg(AsO4)(OH)

Composition:

Molecular Weight = 220.31 gm

Calcium 18.19 % Ca 25.45 % CaO

Magnesium 11.03 % Mg 18.29 % MgO

Arsenic 34.01 % As 52.16 % As₂O₅

Hydrogen 0.46 % H 4.09 % H₂O

Oxygen 36.31 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaMg(AsO₄)(OH)

Environment:

In manganese deposits at Langban.

IMA Status:

Valid Species (Pre-IMA) 1804

Locality:

Sweden, V�rmland, Filipstad, L�ngban mn Link to MinDat.org Location Data.

Name Origin:

From the Greek for indistinct, for its occurrence as massive.

Name Pronunciation:

Adelite

Adelite Image

Images:

Adelite

Comments: Yellowish glassy grains of adelite to 1mm in matrix.
Location: Langban, Filipstad, Varmland, Sweden. Scale: Sample Size 6 x 6.5 x 4.5 cm.
© Tom Loomis / Dakota Matrix

Adelite Crystallography

Axial Ratios:

a:b:c =0.8502:1:0.661

Cell Dimensions:

a = 7.525, b = 8.85, c = 5.85, Z = 4; V = 389.59 Den(Calc)= 3.76

Crystal System:

Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.16(1), 2.59(0.7), 4.13(0.7),

Physical Properties of Adelite

Cleavage:

{???} Indistinct

Color:

Blue gray, Green, Gray, Yellow, Light green.

Density:

3.73 - 3.79, Average = 3.76

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5 - Apatite

Luminescence:

Non-fluorescent.

Luster:

Resinous

Streak:

white

Optical Properties of Adelite

Gladstone-Dale:

CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1918,KPDmeas= 0.1918,KC= 0.1884
Ncalc = 1.7 - 1.71

Optical Data:

Biaxial (+), a=1.712, b=1.721, g=1.731, bire=0.0190

Calculated Properties of Adelite

Electron Density:

Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Adelite =3.76 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Adelite= 25.46 barns/electron
U=PE_Adelite x rElectron Density= 92.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Adelite is Not Radioactive

Adelite Classification

Dana Class:

41.05.01.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.05)where (A B)2 (XO4) Zq

(41.05.01)Adelite Group

41.05.01.01 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.02 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.03 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.04 Duftite-beta? PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.05 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

41.05.01.06 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.07 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.08 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.09 Arsendescloizite PbZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

Strunz Class:

08.BH.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1

08.BH.35 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Arsendescloizite PbZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Duftite-alpha PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Duftite-beta? PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

08.BH.35 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

Other Adelite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Adelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - WWW-MINCRYST

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Adelite

CaMg(AsO4)(OH)
Dana No: 41.05.01.01 Strunz No: 08.BH.35
Locality:

Notes:

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