Glaucochroite data
| Forms | Illustrations | |
| 1 | m, s, nonterminated | |
| 2 | a, m, twinned on h (Penfield, 179) | |
| 3 | b, m, s, x | Figure 110 |
| 4 | a, b, m, s, k, e, f | Figure 111 |
| (a : b : c = 0.4409 : 1 : 0.5809; po = 1.3174, qo = 0.58081) |
|
Form |
Number of readings |
Measured |
Computed |
||||||
|
f |
r |
f |
r |
||||||
|
° |
´ |
° |
´ |
° |
´ |
° |
´ |
||
| (110) |
4a |
66 |
9 |
90 |
0 |
66 |
12 |
90 |
0 |
| (120) |
4a |
49 |
14 |
90 |
0 |
48 |
36 |
90 |
0 |
| (103) |
1 |
94 |
12 |
23 |
11 |
90 |
0 |
23 |
42 |
| (021) |
1 |
0 |
0 |
49 |
30 |
0 |
0 |
49 |
16 |
| (111) |
1 |
66 |
14 |
55 |
12 |
66 |
12 |
55 |
13 |
| (111) |
1 |
113 |
47 |
55 |
18 |
113 |
48 |
55 |
13 |
| (121) |
1 |
49 |
22 |
60 |
29 |
48 |
36 |
60 |
21 |
| a Average. |
|
1 |
2 |
3 |
|
| SiO2 |
31.48 |
31.23 |
31.72 |
| MnO |
38.00 |
34.46 |
33.13 |
| CaO |
28.95 |
23.25 |
29.04 |
| ZnO |
3.28 |
2.40 |
|
| PbO |
1.74 |
0.31 |
|
| MgO |
3.17 |
2.23 |
|
| FeO |
trace |
0.11 |
|
| Fe2O3 |
1.25* |
||
| Al2O3 |
0.95 |
||
| Na2O |
0.39† |
||
| K2O | |||
| H2O |
3.18 |
||
|
100.17 |
100.21 |
99.89 |
| [* represents combined Fe2O3 + Al2O3] |
| [† represents combined Na2O + K2O] |
| 1. Crystals, Franklin. C. H. Warren (179), analyst. |
| 2. Massive mineral (average of two analyses), Franklin. R. B. Gage, analyst (unpublished). |
| 3. Franklin. L. H. Bauer (257), analyst. |
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Website
© by Herb Yeates 1997-2006.
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This
page created: August 12, 2006 6:19 PM
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