Bobdownsite
Bobdownsite is the fluorine-bearing mineral of the whitlockite group of phosphate minerals whose formula is Ca9(Mg)(PO4)6(PO3F). It is isotypic with whitlockite and was misidentified as such until proper chemical analysis. Whitlockites structure and relationships with other phosphate compounds has been extensively studied. Bobdownsite was first recovered from Big Fish River, Yukon, Canada from a Lower Cretaceous outcrop of bedded ironstones and shales. Bobdownsite is named after Robert Terrace Downs a professor of mineralogy in the Department of Geosciences at the University of Arizona, who lived and worked in the Yukon Territory in the 1970s. Bobdownsite is unique because it is the first known naturally forming phosphate to contain a P-F bond.
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Bobdownsite
Bobdownsite is the fluorine-bearing mineral of the whitlockite group of phosphate minerals whose formula is Ca9(Mg)(PO4)6(PO3F). It is isotypic with whitlockite and was misidentified as such until proper chemical analysis. Whitlockites structure and relationships with other phosphate compounds has been extensively studied. Bobdownsite was first recovered from Big Fish River, Yukon, Canada from a Lower Cretaceous outcrop of bedded ironstones and shales. Bobdownsite is named after Robert Terrace Downs a professor of mineralogy in the Department of Geosciences at the University of Arizona, who lived and worked in the Yukon Territory in the 1970s. Bobdownsite is unique because it is the first known naturally forming phosphate to contain a P-F bond.
has abstract
Bobdownsite is the fluorine-be ...... to whitlockite and merrillite.
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Wikipage page ID
48,114,438
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997,698,364
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category
class
Ditrigonal pyramidal
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cleavage
None
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color
Colorless, gray-white, light pink, light yellow
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dana
diagnostic
unit cell dimension
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diaphaneity
Transparent
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fluorescence
none
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formula
Ca96
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fracture
uneven and subconchoidal
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gravity
habit
tabular, euhedral crystals
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luster
Vitreous
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molweight
1.05436e+3
name
Bobdownsite
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opticalprop
uniaxial
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refractive
nω = 1.625 nε = 1.622
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streak
White
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symmetry
R3c
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system
tenacity
Brittle
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unit cell
a = 10.3224 Å,
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c = 37.070 Å; Z = 6
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wikiPageUsesTemplate
hypernym
comment
Bobdownsite is the fluorine-be ...... osphate to contain a P-F bond.
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label
Bobdownsite
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wasDerivedFrom
isPrimaryTopicOf
name
Bobdownsite
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