Table 2 Site populations and unit cell parameters of tremolite SMA1971-214 compared to reference data: (1) tremolite from Gouverneur Mining District (NY, USA)57,58. (2) tremolite from Susa Valley (Piedmont region, Italy)59. (3) tremolite from Ala di Stura (Lanzo Valley, Piedmont region, Italy)60.
From: Occurrence and characterization of tremolite asbestos from the Mid Atlantic Ridge
Parameter | Tremolite SMA1971-214 | (1) | (2) | (3) |
|---|---|---|---|---|
T(1) | Si3.52Al0.48 | Si3.80Al0.20 | Si4 | Si4 |
T(2) | Si4 | Si4 | Si4 | Si4 |
M(1) | Mg1.92Fe0.08 | Mg2 | Al0.01Fe2+0.05Mg1.92Mn0.02 | Mg1.88Fe2+0.09Mn0.03 |
M(2) | Mg1.92Fe0.08 | Mg1.94Fe0.06 | Fe2+0.04Fe3+0.02Mg1.94 | Mg1.86Fe2+0.12Fe3+0.03 |
M(3) | Mg0.96Fe0.04 | Mg | Fe2+0.02Mg0.98 | Mg0.95Fe2+0.05 |
A | Na0.29 | K0.12Na0.18 | – | – |
B | Ca1.92Fe0.08 | Ca1.8Na0.2 | Ca1.95Na0.05K0.01 | Ca1.96Na0.01K0.01 |
a | 9.8469(6) Å | 9.85145(1) Å | 9.84174(8) Å | 9.8424(1) Å |
b | 18.0651(11) Å | 18.02911(2) Å | 18.05932(19) Å | 18.0715(2) Å |
c | 5.2795(4) Å | 5.273416(5) Å | 5.27856(6) Å | 5.28354(7) Å |
V | 907.98(9) Å3 | 905.733(2) Å3 | 907.37(1) Å3 | 909.07(2) Å3 |
β | 104.803(3)° | 104.7566 (1)° | 104.732 (1)° | 104.68(1)° |
