The new mineral mazorite, ideally Ba3(PO4)2, a P-analogue of gurimite Ba3(VO4)2, was discovered in rankinite paralava hosted by the massive gehlenite-bearing pyrometamorphic rocks of the Hatrurim Complex in Israel. It has also recently been discovered in xenolith samples from the Bellerberg volcano in Germany. Holotype mazorite usually forms colourless plate-like crystals up to 70–100 μm in length but also occurs in small aggregates in association with other rare Ba-bearing minerals such as zadovite, celsian, hexacelsian, bennesherite, sanbornite, walstromite, fresnoite, gurimite, alforsite and barioferrite. The mineral is transparent, exhibits vitreous lustre and has a good cleavage on (001). Optically, mazorite is uniaxial (+), with ω = 1.760(3) and ɛ = 1.766(3) (λ = 589 nm). The empirical formula of the holotype mazorite calculated on 8O is (Ba2.69K0.22Na0.04Ca0.02Sr0.01)Σ2.98(P1.16V0.57S0.24Al0.04Si0.03)Σ2.04O8. Mazorite crystallises in space group R$\bar{3}$m, with unit-cell parameters a = 5.6617(5) Å, c = 21.1696(17) Å, V = 587.68(9) Å3 and Z = 3. Its crystal structure consists of BaO12, BaO10, and PO4 polyhedra, ordered along the c-axis in PO4–BaO10–BaO12–BaO10–PO4 columnar arrangement characteristic for palmierite-supergroup minerals. A tetrahedrally coordinated site is generally occupied by P5+ but can be partially substituted by V5+ and S6+. This substitution is shown in the Raman spectrum of mazorite, which reveals bands that can be assigned to the stretching and bending vibrations of (PO4)3–, (VO4)3– and (SO4)2– groups. The Raman spectra of mazorite from two localities (Hatrurim and Bellerberg) and spectra of minerals belonging to the mazorite Ba3(PO4)2 to gurimite Ba3(VO4)2 solid-solution series are presented. The gradual shift of the Raman bands, caused by cation substitutions, is well observed. The high V5+ → P5+ substitution is also observed for gurimite, for which the first X-ray structural data are also presented. Mazorite and other Ba-bearing minerals crystallised from a small portion of residual melt enriched in incompatible elements, such as Ba, V, P, U, S, Ti and Nb, at a temperature of ~1000°C.

新的矿物乳长石，理想的情况是Ba 3 (PO 4 ) 2 ，是gurimite Ba 3 (VO 4 ) 2的P-类似物，是在以色列哈特鲁里姆杂岩的大量含有钙黄长石的火变质岩中发现的兰金长石帕拉熔岩中发现的。最近还在德国贝勒贝格火山的捕虏体样本中发现了这种物质。正型镁橄榄石通常形成长度达 70-100 μm 的无色板状晶体，但也以小聚集体形式出现，与其他稀有含 Ba 矿物如钾辉石、钡长石、六长长石、斜长石、钙长石、瓦硅长石、弗镁锰矿、古里长石、镁铝镁石和重铁氧体。该矿物透明，呈玻璃光泽，(001)解理良好。从光学角度来看，菱沸石是单轴 (+) 的，ω = 1.760(3) 和 ɛ = 1.766(3) (λ = 589 nm)。以8O计算的正型菱镁矿的经验公式为(Ba 2.69 K 0.22 Na 0.04 Ca 0.02 Sr 0.01 ) Σ2.98 (P 1.16 V 0.57 S 0.24 Al 0.04 Si 0.03 ) Σ2.04 O 8。菱沸石在空间群R $\bar{3}$ m中结晶，晶胞参数为a = 5.6617(5) Å, c = 21.1696(17) Å, V = 587.68(9) Å 3且Z = 3。晶体结构由BaO 12、BaO 10和PO 4多面体组成，沿c轴排列，呈棕榈石超族矿物特征的PO 4 –BaO 10 –BaO 12 –BaO 10 –PO 4柱状排列。四面体配位位点通常被P 5+占据，但可以部分地被V 5+和S 6+取代。这种取代显示在镁橄榄石的拉曼光谱中，它揭示了可归属于 (PO 4 ) 3–、(VO 4 ) 3–和 (SO 4 ) 2–基团的伸缩和弯曲振动的谱带。两个地点（哈特鲁里姆和贝勒贝格）的方沸石拉曼光谱以及属于方沸石 Ba 3 (PO 4 ) 2至古里沸石 Ba 3 (VO 4 ) 的矿物光谱)提出了2 个固溶体系列。可以很好地观察到由阳离子取代引起的拉曼谱带的逐渐移动。古里铁矿也观察到高 V 5+ → P 5+取代，并首次提供了其 X 射线结构数据。菱沸石和其他含 Ba 矿物在约 1000°C 的温度下从一小部分富含不相容元素（如 Ba、V、P、U、S、Ti 和 Nb）的残余熔体中结晶出来。