| Abstract: | Taeniolite has been found in a late pegmatitic clot in a mafic alkalic diatreme at Coyote Peak; associated species are natrolite, pectolite, aegirine, barytolamprophyllite, rasvumite and sphalerite. The taeniolite is green-brown with sp. gr. (meas.) 2.85(1) and H. 31/2. Optically it is biaxial (-) with alpha 1.541(2), beta = gamma 1.570(2), 2V approx 0o and moderate pleochroism with gamma = beta reddish-brown, alpha pale greenish brown. Single-crystal precession photographs show it to be of the 1M type, with a 5.254(2), b 9.110(4), c 10.187(2) A, beta 99.85(4)o and V = 480.4(1) A3. Combined microprobe and ion probe analyses gave SiO2 53.5, Al2O3 3.00, TiO2 1.06, FeO 3.35, MnO 0.21, MgO 18.3, Li2O 2.4, K2O 11.3, Na2O 0.27, F 6.3 = 99.69; SrO and BaO are both <0.04 wt.%; B, Be, Ca and Cl were not detected. Assuming (F + OH) = 2 and assigning 1.30 wt.% H2O gives 409(K1.01Na0.04)(Al0.01Ti0.06Fe2+0.20Mn0.01Mg1.92Li0.68)(Si3.76Al0.24)O10- (F1.40OH0.60).-G.W.R. |
| Genre: | Article |
| ProdID: | 70011356 |
| Citation Author: | Erd, R. C.; Czamanske, G. K.; Meyer, C. E. |
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| Citation End Page: | 40 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Mineralogical Record |
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| Citation Number Of Pages: | 2 |
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| Citation Search Results Text: | Taeniolite, an uncommon lithium-mica from Coyote Peak, Humboldt County, California.; 1983; Article; Journal; Mineralogical Record; Erd, R. C.; Czamanske, G. K.; Meyer, C. E. |
| Citation Start Page: | 39 |
| Citation Volume: | 14 |
| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | Taeniolite, an uncommon lithium-mica from Coyote Peak, Humboldt County, California.; 1983; Article; Journal; Mineralogical Record; Erd, R. C.; Czamanske, G. K.; Meyer, C. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1983 00:00 -0600 |
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