The new leucophosphite-group mineral ammoniotinsleyite is found in a guano deposit located on the Pabellón de Pica Mountain, Iquique Province, Tarapacá Region, Chile. Associated minerals are halite, gypsum, salammoniac and clay minerals. Ammoniotinsleyite occurs as pink to pale violet globular aggregates up to 3 mm across with individual single crystals ~10–15 μm. The mineral is brittle. Its Mohs hardness is 4. Dmeas. = 2.42(2) g cm–3 and Dcalc. = 2.451 g cm–3. The IR spectrum shows the presence of NH4+ and PO43– groups and H2O molecules. Ammoniotinsleyite is optically biaxial (+), α = 1.557(2), β = 1.559 (calc.), γ = 1.563(2) (λ = 589 nm); and 2Vmeas. = 75(10)°. The chemical composition (K, Mg, Ca, Al, Fe and P from electron-microprobe data; H, C and N measured by gas chromatography on products of ignition at 1200°C; wt.%) is: (NH4)2O 7.25, K2O 1.50, MgO 0.42, CaO 0.34, Al2O3 29.91, Fe2O3 2.36, P2O5 43.97, H2O 14.89, CO2 below detection limit, total 100.64. The empirical formula is [(NH4)0.88K0.10Ca0.02)]Σ1.00(Al1.86Fe3+0.09Mg0.03)Σ1.98(PO4)1.96(OH)1.05⋅2.11H2O. The idealised formula is (NH4)2Al2(PO4)2(OH)⋅2H2O. The crystal structure of ammoniotinsleyite was refined based on powder X-ray diffraction data, using the Rietveld method. The final agreement factors are: Rp = 0.0071, Rwp = 0.0093 and Robs = 0.0167. The new mineral is isostructural with tinsleyite, spheniscidite and leucophosphite. It is monoclinic, space group P21/n, a = 9.5871(1) Å, b = 9.6089(1) Å, c = 9.6467(2) Å, β = 103.4461(8)°, V = 864.31(2) Å3 and Z = 4. The strongest reflections of the powder X-ray diffraction pattern [d,Å(I,%)(hkl)] are: 7.56(23)( $\bar{1}$ 01), 6.71(79)(011, 110), 5.947(100)(101, $\bar{1}$ 11), 4.676(36)(002, 200), 3.032(28)( $\bar{1}$ 13, 031, 130), 2.958(25)( $\bar{2}$ 22, 310, $\bar{1}$ 31) and 2.635(29)( $\bar{2}$ 31).

在智利塔拉帕卡地区伊基克省帕贝隆·德·皮卡山的鸟粪矿床中发现了新的亚磷酸盐亚族矿物铵盐。伴生的矿物是盐岩，石膏，salammoniac和粘土矿物。铵铁矿矿为粉红色至浅紫色球状聚集体，跨距最大3 mm，单个晶体约10–15μm。矿物很脆。其莫氏硬度为4，d MEAS。= 2.42（2）g cm –3和D钙。= 2.451 g cm –3。红外光谱表明存在NH 4 +和PO 4 3–基团以及H 2O分子。铵钛矿为光学双轴（+），α= 1.557（2），β= 1.559（计算），γ= 1.563（2）（λ= 589 nm）; 和2V测量 = 75（10）°。化学成分（来自电子探针数据的K，Mg，Ca，Al，Fe和P；通过气相色谱在1200°C点火产物上测量的H，C和N；重量百分比）为：（NH 4）2 O 7.25，K 2 O 1.50，MgO 0.42，CaO 0.34，Al 2 O 3 29.91，Fe 2 O 3 2.36，P 2 O 5 43.97，H 2 O 14.89，CO 2低于检出限，总计100.64。经验公式为[（NH 4）0.88 K0.10的Ca 0.02）] Σ1.00（铝1.86的Fe 3+ 0.09的Mg 0.03）Σ1.98（PO 4）1.96（OH）1.05 ⋅2.11H 2 O.理想化的式为（NH 4）2的Al 2（PO 4）2（OH）⋅2H 2 O. ammoniotinsleyite的晶体结构基于粉末X射线衍射数据进行精制，使用Rietveld法。最终协议因子为：R p = 0.0071，R w p = 0.0093和R obs＝ 0.0167。新的矿物与廷斯利特，绿钠锰矿和亚磷灰石是同构的。它是单斜的，空间群P 2 1 / n，a = 9.5871（1）Å，b = 9.6089（1）Å，c = 9.6467（2）Å，β= 103.4461（8）°，V = 864.31（2）埃3和ž = 4的粉末X射线衍射图案的最强的反射[ d，A（我，％）（HKL）]是：7.56（23）（ $ \巴{1} $ 0.01），6.71（ 79）（011，110），5.947（100）（101， $ \ bar {1} $ 11），4.676（36）（002，200），3.032（28）（ $ \ bar {1} $ 13，031，130），2.958（25）（ $ \ bar {2} $ 22，310， $ \ bar {1} $ 31）和2.635（29）（ $ \ bar {2} $ 31）。