Table 1.
Chemical formula, doping mol.%, unit cell (a, c) parameters and volume (V) in Ca9.5–xSrxCu(PO4)7 0 ≤ x ≤ 4.5 samples.
| Chemical Formula | mol.%, Sr2+ | a, Å | c, Å | V, Å3 |
|---|---|---|---|---|
| Ca9.5Cu(PO4)7 | 0 | 10.3430(1) | 37.226(5) | 3448.8(5) |
| Ca9Sr0.5Cu(PO4)7 | 4.8 | 10.3631(7) | 37.302(3) | 3469.4(3) |
| Ca8.5SrCu(PO4)7 | 9.5 | 10.3882(9) | 37.421(4) | 3497.3(4) |
| Ca8Sr1.5Cu(PO4)7 | 14.3 | 10.4101(3) | 37.518(1) | 3521.4(8) |
| Ca7.5Sr2Cu(PO4)7 | 19.0 | 10.4281(2) | 37.633(7) | 3544.1(7) |
| Ca7Sr2.5Cu(PO4)7 | 23.8 | 10.4501(4) | 37.780(5) | 3578.1(5) |
| Ca6.5Sr3Cu(PO4)7 | 28.6 | 10.4671(4) | 37.927(7) | 3591.7(7) |
| Ca6Sr3.5Cu(PO4)7 | 33.3 | 10.4842(2) | 38.092(6) | 3626.1(7) |
| Ca5.5Sr4Cu(PO4)7 | 38.1 | 10.5003(2) | 38.243(6) | 3651.6(7) |
| Ca5Sr4.5Cu(PO4)7 | 42.8 | 10.5210(4) | 38.414(3) | 3682.7(5) |