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Morelandite

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Formula:
Ca2Ba3(AsO4)3Cl
Colour:
light yellow to grey
Lustre:
Vitreous, Greasy
Hardness:
Specific Gravity:
5.33
Name:
Named by Pete J. Dunn and Roland C. Rouse in 1978 in honor of Grover C. Moreland (1912-1978), supervisor of the sample preparation laboratory at the Smithsonian Institution, Washington, D.C., USA, 'in honor of his dedication to the support of mineralogical research'.
Apatite Group. The barium analogue of Mimetite.


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Classification of MorelanditeHide

Approved
Approval Year:
1977
First Published:
1978
7/B.39-130
8.BN.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
41.8.5.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : A5(XO4)3Zq
22.2.8

22 : Phosphates, Arsenates or Vanadates with other Anions
2 : Phosphates, arsenates or vanadates with chloride

Physical Properties of MorelanditeHide

Vitreous, Greasy
Transparency:
Translucent
Colour:
light yellow to grey
Streak:
white
Hardness:
4½ on Mohs scale
Cleavage:
Poor/Indistinct
extremely weak parallel to {001}
Density:
5.33 g/cm3 (Measured)    5.30 g/cm3 (Calculated)

Optical Data of MorelanditeHide

Type:
Uniaxial (+)
RI values:
nω = 1.880 nε = 1.884
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of MorelanditeHide

Formula:
Ca2Ba3(AsO4)3Cl

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.089 (30)
4.175 (30)
3.658 (50)
3.030 (100)
2.969 (70)
2.935 (60)
1.965 (30)

Type Occurrence of MorelanditeHide

Place of Conservation of Type Material:
National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560 under catalog number C4147.
The Royal Ontario Museum, Toronto, Ontario, Canada, M35176.
Harvard University, Cambridge, Massachusetts, 126607.
British Museum (Nat. Hist

Synonyms of MorelanditeHide

Other Language Names for MorelanditeHide

German:Morelandit
Spanish:Morelandita

Relationship of Morelandite to other SpeciesHide

Other Members of this group:
AiolositeNa4Bi(SO4)3ClHex. 6/m : P63/m
CaracoliteNa3Pb2(SO4)3ClMon.
CesaniteNa3Ca2(SO4)3(OH)Hex.
FluorphosphohedyphaneCa2Pb3(PO4)3FHex. 6/m : P63/m
HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Miyahisaite(Sr,Ca)2Ba3(PO4)3F Hex. 6/m : P63/m
PhosphohedyphaneCa2Pb3(PO4)3ClHex. 6/m : P63/m

Related Minerals - Nickel-Strunz GroupingHide

8.BN.05AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
8.BN.05Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)Hex.
8.BN.05Carbonate-rich HydroxylapatiteCa5(PO4,CO3)3(OH,O)Hex.
8.BN.05ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
8.BN.05Johnbaumite-MCa5(AsO4)3OHMon. 2/m : P21/m
8.BN.05FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
8.BN.05HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
8.BN.05JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
8.BN.05MimetitePb5(AsO4)3ClHex. 6/m : P63/m
8.BN.05PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
8.BN.05FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
8.BN.05SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05TurneaureiteCa5(AsO4)3ClHex.
8.BN.05VanadinitePb5(VO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(La)NaLaSr3(PO4)3FTrig. 3 : P3
8.BN.05Deloneite(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5Trig.
8.BN.05FluorcaphiteSrCaCa3(PO4)3FHex. 6/m : P63/m
8.BN.05Kuannersuite-(Ce)NaCeBa3(PO4)3F0.5Cl0.5Trig. 3 : P3
8.BN.05Hydroxylapatite-MCa5(PO4)3OHMon. 2/m : P21/b
8.BN.05PhosphohedyphaneCa2Pb3(PO4)3ClHex. 6/m : P63/m
8.BN.05StronadelphiteSr5(PO4)3FHex. 6/m : P63/m
8.BN.05FluorphosphohedyphaneCa2Pb3(PO4)3FHex. 6/m : P63/m
8.BN.05Carlgieseckeite-(Nd)NaNdCa3(PO4)3FTrig. 3 : P3
8.BN.05Miyahisaite(Sr,Ca)2Ba3(PO4)3F Hex. 6/m : P63/m
8.BN.10ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m

Related Minerals - Dana Grouping (8th Ed.)Hide

41.8.5.2AlforsiteBa5(PO4)3ClHex. 6/m : P63/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.2.1SampleiteNaCaCu5(PO4)4Cl · 5H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
22.2.2LavendulanNaCaCu5(AsO4)4Cl · 5H2OMon. 2/m
22.2.3ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
22.2.4TurneaureiteCa5(AsO4)3ClHex.
22.2.5ShubnikoviteCa2Cu8(AsO4)6(OH)Cl · 7H2O
22.2.6RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2OMon. 2/m
22.2.7AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
22.2.9PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
22.2.10MimetitePb5(AsO4)3ClHex. 6/m : P63/m
22.2.11Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
22.2.12SahlinitePb14(AsO4)2O9Cl4Mon.
22.2.13GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
22.2.14VanadinitePb5(VO4)3ClHex. 6/m : P63/m
22.2.15KombatitePb14(VO4)2O9Cl4Mon.
22.2.16LeningraditePbCu3(VO4)2ClOrth. mmm (2/m 2/m 2/m) : Ibam
22.2.17HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
22.2.18NealitePb4Fe2+(As3+O3)2Cl4 · 2H2OTric. 1 : P1

Fluorescence of MorelanditeHide

None observed.

Other InformationHide

Notes:
Completely soluble in cold dilute 1:1 nitric acid. Whitens to an opaque chalky appearance after prolonged immersion in cold dilute l:l hydrochloric acid.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MorelanditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P.J., Rouse, R.C. (1978) Morelandite, a new barium arsenate chloride member of the apatite group. Canadian Mineralogist: 16: 601-604.
Fleischer, M., Pabst, A., Mandarino, J.A. (1980) New mineral names. American Mineralogist: 65: 205-210.
Bell, A.M.T., Henderson, C.M.B., Wendlandt, R.F., Harrison, W.J. (2008) Rietveld refinement of Ba5(AsO4)3Cl from high-resolution synchrotron data. Acta Crystallographica: E64: i63-i64.
Dordevic, T., Sutovic, S., Stojanovic, J., Karanovic, L. (2008) Sr, Ba and Cd arsenates with the apatite-type structure. Acta Crystallographica: C64: i82-i86.
Pasero, M., Kampf, A.R., Ferraris, C., Pekov, I.V., Rakovan, J.R., White, T.J. (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy: 22: 163-179.

Internet Links for MorelanditeHide

Localities for MorelanditeHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Sweden (TL)
 
  • Värmland
    • Filipstad
      • Nordmark district
        • Jakobsberg ore field
Canadian Mineralogist(1978) 17, 601-604
Mineral and/or Locality  
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