Morelandite Mineral Data

General Morelandite Information

Chemical Formula:

(Ba,Ca,Pb)5(AsO4,PO4)3Cl

Composition:

Molecular Weight = 1,005.93 gm

Barium 40.96 % Ba 45.73 % BaO

Calcium 5.98 % Ca 8.36 % CaO

Arsenic 18.62 % As 28.56 % As₂O₅

Phosphorus 1.54 % P 3.53 % P₂O₅

Lead 10.30 % Pb 11.09 % PbO

Chlorine 3.52 % Cl 3.52 % Cl

- % Cl -0.80 % -O=Cl₂

Oxygen 19.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba₃Ca_1.5Pb_0.5(AsO₄)_2.5(PO₄)_0.5Cl

IMA Status:

Approved IMA 1978

Locality:

Jakobsberg mine, near Hordmark, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Groven C. Moreland (1912-1978), supervisor of sample preparation laboratory, National Museum of Natural History, Smithsonian Institution, Washington, DC., USA.

Name Pronunciation:

Morelandite + Pronunciation

Morelandite Crystallography

Axial Ratios:

a:c = 1:0.71934

Cell Dimensions:

a = 10.169, c = 7.315, Z = 2; V = 655.09 Den(Calc)= 5.10

Crystal System:

Hexagonal Space Group: P 6₃/m,P 6₃

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

By Intensity(I/I_o): 3.03(1), 2.969(0.7), 2.935(0.6),

Physical Properties of Morelandite

Cleavage:

{0001} Indistinct

Color:

Greenish yellow, Gray, Grayish yellow, Light yellow.

Density:

5.32

Diaphaneity:

Transparent to Translucent

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4.5 - Between Fluorite and Apatite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Morelandite

Gladstone-Dale:

CI meas= -0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.118 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1729,KPDmeas= 0.1658,KC= 0.1547
Ncalc = 1.79 - 1.82

Optical Data:

Uniaxial (+), w=1.88, e=1.884, bire=0.0040.

Calculated Properties of Morelandite

Electron Density:

Bulk Density (Electron Density)=4.68 gm/cc
note: Specific Gravity of Morelandite =5.32 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Morelandite= 381.58 barns/electron
U=PE_Morelandite x rElectron Density=1,783.94 barns/cc.

Radioactivity:

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

Morelandite Classification

Dana Class:

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

(41.08)where (A)5 (XO4)3 Zq

(41.08.05)Morelandite Group

41.08.05.01 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

41.08.05.02 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

Strunz Class:

08.BN.05 08 - PHOSPHATES, ARSENATES, VANADATES

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

08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1

08.BN.05 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

08.BN.05 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

08.BN.05 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

08.BN.05 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 6₃/m 6/m

08.BN.05 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

08.BN.05 Johnbaumite Ca5(AsO4)3(OH) P 6₃/m,P 6₃ Hex

08.BN.05 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

08.BN.05 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

08.BN.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

08.BN.05 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

08.BN.05 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

08.BN.05 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

08.BN.05 Hedyphane Ca2Pb3(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

08.BN.05 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

08.BN.05 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 2₁/b 2/m

08.BN.05 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

08.BN.05 Svabite Ca5(AsO4)3F P 6₃/m 6/m

08.BN.05 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

08.BN.05 Turneaureite Ca5[(As,P)O4]3Cl P 6₃/m 6/m

08.BN.05 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

08.BN.05 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

08.BN.05 Hydroxylpyromorphite! Pb5(PO4)3OH P 6₃/m 6/m

Other Morelandite 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 Morelandite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Morelandite Specimen Label here :

Morelandite

(Ba,Ca,Pb)5(AsO4,PO4)3Cl
Dana No: 41.08.05.01 Strunz No: 08.BN.05
Locality:

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