Pink lanthanite-(Nd) from Whitianga Quarry, Coromandel Peninsula, New Zealand
Pink lanthanite-(Nd) from Whitianga Quarry, Coromandel Peninsula, New Zealand
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DOI：
10.3749/canmin.45.6.1389
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发表时间：
2007-12
影响因子：
0.9
通讯作者：
I. Graham;R. Pogson;D. Colchester;J. Hergt;Rod Martin;P. Williams
中科院分区：
文献类型：
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作者：
I. Graham;R. Pogson;D. Colchester;J. Hergt;Rod Martin;P. Williams
镧钛矿-(Nd)产于新西兰科罗曼德尔半岛Whitianga采石场的凝灰岩蚀变安山岩砾岩中。通常的盘状晶体，以及更不寻常的块状等分晶体。前者显示新形式{201}、{102}和{111}，后者显示新形式{111}。ICP-MS分析表明，稀土元素（和Ga）的分布符合如下公式(Nd 0.63 La 0.59 Ce 0.35 Pr 0.15 Sm 0.10 Gd 0.069 Y 0.06 Eu 0.03 Dy 0.02 Ga 0.01)∑2.04 (CO 3) 3·8H 2o；REE和为2.04完全是由于舍入误差造成的。这一发现是新西兰首次发现这种稀有矿物。在相对氧化的条件下形成的矿物。稀土元素可能是由流经马纳亚山群下伏灰岩的暖水循环带走的。我们还用x射线衍射（粉末法）和拉曼光谱对镧钛矿（Nd）进行了表征。
Lanthanite-(Nd) occurs in tuffaceous, altered andesitic agglomerate in the Whitianga quarry, Coromandel Peninsula, New Zealand. The usual platy habit is represented, together with more unusual blocky equant crystals. The former show the new forms {201}, {102} and {111}, and the latter, {111}. ICP–MS analyses show that the distribution of REE (and Ga) is consistent with the formulation (Nd 0.63 La 0.59 Ce 0.35 Pr 0.15 Sm 0.10 Gd 0.069 Y 0.06 Eu 0.03 Dy 0.02 Ga 0.01 ) ∑ 2.04 (CO 3 ) 3 ·8H 2 O; the REE sum of 2.04 is due solely to rounding errors. The find represents the first occurrence of this rare mineral in New Zealand. The mineral formed under comparatively oxidizing conditions. The REE are probably scavenged by warm waters circulating through underlying greywackes of the Manaia Hill Group. We also characterized the lanthanite-(Nd) by X-ray diffraction (powder method) and Raman spectroscopy.