Deynekoite, Ca9□Fe3+(PO4)7 (R3c, a = 10.3516(3)Å, c = 37.1599(17)Å, V = 3448.4(3)Å3 and Z = 6), a new mineral of the merrillite group was found in the contact facies of paralava of the Hatrurim Complex in the Daba-Siwaqa pyrometamorphic rock field, Jordan. The paralava, consisting of diopside, tridymite, anorthite, wollastonite and fluorapatite, is enriched in Fe-bearing phosphides and phosphates at the contact with the altered country rock. Cristobalite overgrowing tridymite has a fish-scales texture indicating that temperature of paralava could have reached 1500°C. Deynekoite with empirical formula (Ca8.90Na0.11K0.02)Σ9.03(Fe3+0.62Mg0.30Al0.05)Σ0.97P6.98V5+0.05O27.70(OH)0.30 forms transparent, light-yellow or light-brown grains up to 30–40 μm in size. Microhardness of deynekoite, VHN25 = 319(29) kg/mm2, corresponds to Mohs hardness = 4.5. Its density was calculated as 3.09 g⋅cm–3 on the basis of its empirical composition and structural data. Deynekoite is uniaxial (−), its refractive indices are ω = 1.658(3), ɛ = 1.652(3) (λ = 589 nm), and pleochroism is not observed. The formation of phosphides on the boundary of the paralava and country rock is connected with carbothermal reductive reactions and realised at temperatures above 1300°С. With decreasing temperature and increasing oxygen activity, phosphides are replaced by Fe2+-bearing phosphates. Deynekoite, which contains Fe3+ (substituting for Fe2+-phosphates) and a small amount of water, formed at temperatures of 600–800°C.

Deynekoite, Ca 9 □Fe 3+ (PO 4 ) 7 ( R 3 c , a = 10.3516(3)Å, c = 37.1599(17)Å, V = 3448.4(3)Å 3和Z = 6)，一种新的在约旦 Daba-Siwaqa 火变质岩田的 Hatrurim 杂岩的帕拉熔岩接触相中发现了美瑞沸石族矿物。帕拉熔岩由透辉石、鳞石英、钙长石、硅灰石和氟磷灰石组成，在与蚀变围岩接触处富含含铁磷化物和磷酸盐。方英石过度生长的鳞石英具有鱼鳞状纹理，表明帕拉岩的温度可能达到 1500°C。经验式 (Ca 8.90 Na 0.11 K 0.02 ) Σ9.03 (Fe 3+ 0.62 Mg 0.30 Al 0.05 ) Σ0.97 P 6.98 V 5+ 0.05 O 27.70 (OH) 0.30形成透明、浅黄色或浅棕色颗粒尺寸可达 30–40 μm。斜钠石的显微硬度VHN 25 = 319(29) kg/mm 2，对应于莫氏硬度= 4.5。根据其经验成分和结构数据，计算出其密度为 3.09 g⋅cm –3 。 Deynekoite 是单轴 (−) 的，其折射率为 ω = 1.658(3)、ɛ = 1.652(3) (λ = 589 nm)，未观察到多色性。帕拉熔岩和围岩边界上磷化物的形成与碳热还原反应有关，并在 1300°С 以上的温度下实现。随着温度降低和氧活度增加，磷化物被含Fe 2+的磷酸盐取代。 Deynekoite 含有 Fe 3+（替代 Fe 2+ -磷酸盐）和少量水，在 600–800°C 的温度下形成。