The chemistry and the crystal structure of the recently described mineral argentopolybasite are critically discussed based on the study of two new occurrences of the mineral: Gowganda, Timiskaming District, Ontario, Canada and IXL Mine, Silver Mountain mining district, Alpine County, California.

The crystal structure of argentopolybasite can be described as the sequence, along the c axis, of two alternating layers: a [Ag6Sb2S7]2– A layer and a [Ag10S4]2+ B layer. In the B layer there are linearly-coordinated metal positions (B sites), which are usually occupied by copper in all members of the pearceite–polybasite group, resulting in a B-layer composition [Ag9CuS4]2+. In argentopolybasite, however, Ag fills all the metal sites in both A and B layers. By means of a multi-regression analysis on 67 samples of the pearceite–polybasite group, which were studied by electron microprobe and single-crystal X-ray diffraction, the effect of Ag, Sb and Se on the B sites of the B layer was modelled. Although the nomenclature rules for these minerals are based on chemical data only, we think this approach is useful to evaluate the goodness of the refinement of the structure (Ag/Cu disorder) and thus fundamental to discriminate different members of the pearceite–polybasite group.

基于对该矿物的两个新产状的研究，对最近描述的矿物银多碱石的化学和晶体结构进行了批判性讨论：加拿大安大略省蒂米斯卡明区的 Gowganda 和加利福尼亚州阿尔卑斯县银山矿区的 IXL 矿。

银多碱石的晶体结构可以描述为沿c轴的两个交替层的序列：[Ag 6 Sb 2 S 7 ] 2– A层和[Ag 10 S 4 ] 2+ B层。在B层中存在线性配位的金属位置（B位点），这些金属位置通常被珠光矿-多碱金属矿组的所有成员中的铜占据，从而形成B层成分[Ag 9 CuS 4 ] 2+。然而，在银多碱矿中，Ag 填充了两者中的所有金属位点。A层和B层。通过电子显微镜和单晶X射线衍射对67个珠光矿-聚碱石族样品进行多元回归分析，研究了Ag、Sb和Se对B层B位的影响。建模。尽管这些矿物的命名规则仅基于化学数据，但我们认为这种方法对于评估结构细化（银/铜无序）的良好程度很有用，因此对于区分珠光矿-多碱矿组的不同成员至关重要。