General Information:
Chemical Formula:
(Ba,Ca,Pb)5(AsO4,PO4)3Cl
Composition:
(Molecular Weight = 1,005.93 gm)
Barium 40.96 % Ba
Calcium 5.98 % Ca
Arsenic 18.62 % As
Phosphorus 1.54 % P
Lead 10.30 % Pb
Chlorine 3.52 % Cl
Oxygen 19.09 % O
Empirical Formula:
Ba3Ca1.5Pb0.5(AsO4)2.5(PO4)0.5Cl
IMA Status:
Approved IMA 1978
Locality:
Jakobsberg mine, near Hordmark, Sweden.
Name Origin:
Named for Groven C. Moreland (1912-1978), supervisor of sample preparation laboratory, National Museum of Natural History, Smithsonian Institution, Washington, DC., USA.
Physical Properties:
Cleavage:
[0001] Indistinct
Color:
greenish yellow, gray, grayish yellow, or light yellow.
Density:
5.32
Diaphaniety:
Transparent to Translucent
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:
4.5 - Between Fluorite and Apatite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Streak:
white
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