Tephroite Fujino K, Sasaki S, Takeuchi Y, Sadanaga R Acta Crystallographica B37 (1981) 513-518 X-ray determination of electron distributions in forsterite, fayalite and tephroite Locality: synthetic _database_code_amcsd 0019695 4.9023 10.5964 6.2567 90 90 90 Pbnm atom x y z Biso Mn1 0 0 0 .620 Mn2 .98792 .28041 .25 .531 Si .42755 .09643 .25 .382 O1 .75776 .09363 .25 .537 O2 .21088 .45369 .25 .542 O3 .28706 .16384 .04140 .579