Tourmaline (dravite) from the Boehls Butte anorthosite, Idaho, U.S.A.
Geological Society of Finland, Bulletin
By: Anna Hietanen
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Abstract
Tourmaline (dravite) from a layered two-plagioclase anorthosite in the Boehls Butte quadrangle, Idaho, has the following structural formula: (Na0.55Ca0.17)0.72(Mg1.96Fe0.57Mn0.01Ti0.04V0.03Al0.47)3.08Al6(BO3)3.02Si5.98O18(OH,F)3.35. The indices of refraction are ω = 1.647(1) and ε = 1.621(1), and the unit cell parameters are a = 15.9425(6) and c = 7.1883(3).
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Tourmaline (dravite) from the Boehls Butte anorthosite, Idaho, U.S.A. |
| Series title | Geological Society of Finland, Bulletin |
| DOI | 10.17741/bgsf/59.2.002 |
| Volume | 59 |
| Issue | 2 |
| Year Published | 1987 |
| Language | English |
| Publisher | Geological Society of Finland |
| Description | 5 p. |
| First page | 91 |
| Last page | 95 |
| Country | United States |
| State | Idaho |
| Other Geospatial | Boehls Butte |