Carbonatites in the Fen intrusive complex (southern Norway) contain abundant burbankite (confirmed by Raman microspectroscopy) as inclusions in calcite, dolomite and, less commonly, fluorapatite and pyrochlore. Typically the inclusions occur in the core of calcite or dolomite grains relatively unaffected by subsolidus processes, and are associated with Fe-poor dolomite or Sr-rich calcite, respectively. Burbankite does not exceed 30 × 50 μm in size and is characteristically absent from the peripheral areas of carbonate grains affected by recrystallization or interaction with fluids. Compositionally, the mineral falls within the following range: (Na_1.51–2.16Ca_0.58–1.21)(Sr_1.50–2.42Ca_0.28–0.57LREE_0.05–0.64Ba_0.06–0.41)(CO₃)₅ and contains low Th, but no detectable Mg, Fe or F (LREE = light rare-earth elements: Ce > La > Nd > Pr > Sm). Burbankite inclusions at Fen are interpreted as primary and indicative of Na enrichment in their parental carbonatitic magma. Dissociation of burbankite during subsolidus re-equilibration of its host phases with fluids undoubtedly served as one of the sources of LREE for the development of late-stage mineralization in the Fen complex.

Fen侵入复合体（挪威南部）中的碳酸盐岩包含丰富的方钠石（通过拉曼光谱法确认），作为方解石，白云岩以及较不常见的氟磷灰石和烧绿石中的夹杂物。通常，夹杂物存在于方解石过程相对不受影响的方解石或白云石晶粒的核中，并且分别与贫铁白云石或富Sr方解石有关。Burbankite的尺寸不超过30×50μm，并且特征在于在受重结晶或与流体相互作用影响的碳酸盐颗粒的外围区域中不存在。成分上的矿物属于以下范围：（Na _1.51–2.16 Ca _0.58–1.21）（Sr _1.50–2.42 Ca _0.28–0.57 LREE _0.05–0.64 Ba_0.06-0.41）（CO ₃）₅并含有低Th，但没有可检测到的Mg，Fe或F（LREE =轻稀土元素：Ce> La> Nd> Pr> Sm）。Fen的Burbankite夹杂物被解释为是其母体碳酸盐岩浆中Na富集的主要指示。在solid固相的亚固相重新平衡过程中，与流体之间的解构无疑使bank岩成为LREE的来源之一，从而促进了Fen矿床后期矿化的发展。