Combeite Fischer R X, Tillmanns E Neues Jahrbuch fur Mineralogie, Monatshefte 1983 (1983) 49-59 Die Kristallstrukturen von naturlichem Na2Ca2Si3O9 vom Mt.Shaheru (Zaire) und aus dem Mayener Feld (Eifel) Note: this is the low-temperature form of combeite Locality: Mayener Feld, Eifel, Germany _database_code_amcsd 0019534 10.464 10.464 13.176 90 90 120 P3_2 atom x y z occ Biso Nal .6503 .0067 .4144 .5 1.3 Na2 .9935 .1618 .3442 1.4 Na3 .5042 .6784 .3389 1.12 Na4 .652 .509 .679 1.4 Na5 .1468 .9723 .1807 1.18 Cal .9751 .6421 .3395 .66 Ca2 .8438 .3332 .5055 .66 Ca3 .3033 .8123 .4965 1.42 Ca4 .9828 .6617 .5915 .5 1.11 Si1 .4710 .1811 .5623 .81 Si2 .1904 .4819 .4358 .29 Si3 .6207 .4840 .4472 .53 Si4 .4896 .6553 .5675 .46 Si5 .8176 .8564 .2405 .66 Si6 .8455 .8310 .7762 .61 O1 .6015 .6131 .5077 1.2 O2 .666 .1709 .1718 2.0 O3 .347 .599 .4929 1.2 O4 .778 .8907 .3498 1.4 O5 .894 .804 .6726 1.4 O6 .4773 .2659 .1305 .9 O7 .261 .4331 .8940 1.3 O8 .162 .235 .1162 1.5 O9 .8866 .752 .2277 1.1 O10 .5168 .088 .0009 1.3 O11 .4410 .5765 .6760 1.1 O12 .7613 .5766 .0128 1.3 O13 .554 .780 .9949 1.4 O14 .931 .011 .1832 1.4 O15 .733 .6766 .8368 1.4 O16 .666 .775 .1727 1.9 O17 .8546 .4533 .2125 .7 O18 .448 .531 .1148 1.5