Celestite |
| SrSO4 |
| Orthorhombic |
Forms
c(001), a(100), m(110), o(011), d(102), z(111)
Occurrence
Crystals of celestite, either prismatic parallel to the brachyaxis or tabular parallel to
the base, and showing all the forms listed except a , were described and figured
by Gordon (222). The crystals are described as brilliant and colorless, rarely more than a
tenth of an inch in size, and coating cavities in rhodochrosite that was associated with
calcite and franklinite. The celestite was biaxial and positive, a = 1.621, b = 1.625, g
= 1.631.
Gordon's description of celestite from Franklin drew attention to its presence, and it has since been noted on several specimens in small veins, where it plays the same part that the more common barite generally does.
In 1930 celestite was reported from Sterling Hill where good crystals tabular to the macropinacoid (figure 197) were found in a cavity in franklinite ore.
| Figure 197 Crystal of celestite tabular parallel to the macropinacoid, showing the forms c(001), a(100), m(110), d(102), o(011), and z(111). Sterling Hill. |
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Website
© by Herb Yeates 1997-2006.
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page created: August 12, 2006 5:51 PM
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